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This is the Header Questionnaire that we ask our Header Customers or our Advice Service
Customers to fill out.  Note that we ask close to 100 questions to determine the best
possible header design recommendation.  Contrast that to others who only ask
"What vehicle do you have?  What engine do you have?"

ONLY TWO questions?  Questions concerned ONLY with fit?  NO questions about what may
or may not have been done to the engine, how the rest of the vehicle is setup, intended
usage, where you live and/or race, what you want the headers to accomplish, etc.? 

You may print this Questionnaire to take advantage of our Header Design Advice Service.
(.5" top & bottom page margins, .4" or less left & right margins should cause this to print correctly.)

Note that the charges for the rendering of this service are listed at the end.


The purpose of this questionnaire is to give us an accurate description of your
vehicle, its engine and any modifications made to it, plus its intended use.

PLEASE BE REALISTIC where expectations are concerned!

Not all of these questions will concern your vehicle, but try to answer all of
those that do as the information you provide here determines how we will:
(1) Design and Construct the headers for your particular vehicle or 
(2) Recommend Specific Header Dimensions (and possibly Header Parts)
if you are taking advantage of our Header Design Advice Service.



Year, Make, and Model of Vehicle _______________________________________________________  Weight _______________

If vehicle is used for daily transportation, should header be designed to MAXIMIZE:

          Street Performance _______  or Drag Strip Performance _______?

If not used for daily transportation, is vehicle primarily:

          Raced with occasional street use _______ or Raced ONLY _______?

Track length:  300’ ______    1/8 Mile ______    1/4 Mile ______    1/3 Mile ______    3/8 Mile ______    1/2 Mile ______    Other length  _________

Other use (Pulling, Mud racing, Sand dragging, Circle Track, Closed Course Racing, Experimental Aircraft, etc.).   Please describe.



Driven/Raced through mufflers? __________ Brand name, body length, inlet/outlet diameters __________________________________________________________

Class(es) and Sanctioning Body(ies) vehicle is competing in ____________________________________________________________________________________




  A.  Year, Make, Stock Horsepower Rating of Engine ______________________________________________________________

  B.  Number of Cylinders ___________  Cubic Inches ___________  Bore ___________  Stroke ___________  Compression Ratio ___________

  C.  Is the engine:  FACTORY STOCK (never been apart) _________  recently rebuilt _________  balanced _________  blueprinted _________?

  D.  Estimated Peak Engine Horsepower ______________________  (This value is very IMPORTANT - don’t omit it!  Also, PLEASE BE REALISTIC.)
                 (If the number given is actually MEASURED dyno horsepower, it would REALLY BE NICE to know something about the headers used during the test:

                  Brand Name ________________________________ Tube Size ________________Tube Length ________________  Collector Size ________________

  E.  Estimated Peak Rear Wheel Horsepower ______________________  (This value can be left out - estimated above Peak Horsepower value can NOT be left out.)


  A.  Carburetion (Quantity, Manufacturer, Model, CFM Rating) __________________________________________________________________________________

  B.  Intake Manifold - Manufacturer, Model, Design (180o, open plenum, tunnel ram, etc.) _____________________________________________________________


  C.  Other (Injection, Supercharged, Nitrous Oxide, etc.) _______________________________________________________________________________________


  D.  If using Nitrous Oxide, should the headers be optimized to work with the Nitrous On __________ or Off __________?

  E.  If using a Supercharger on the street, should the headers be designed to work with it producing full boost or to work better in  "normal" driving (little or no boost)?

          Full boost __________  Normal Driving __________


  A.  Year, Model/Version, Manufacturer, Cast Iron/ Aluminum ___________________________________________________________________________________

  B.  Modifications______________________________________________________________________________________________________________________

         1.    Intake Valve Size___________________  If oversize, how much?_________________

         2.    Exhaust Valve Size_________________   If oversize, how much?_________________

  C.  Shape and Size of Exhaust Ports (give measurements in blanks)

         1.    ______________ x _______________  Round (Inside Diameter) or Oval (Height x Width)

         2.    _______________________________  Square

         3.    ______________ x _______________  Rectangular (Height x Width)

         4.    _______________________________  Other Shape (Send tracing of exhaust ports AND bolt holes!)

If ports have been enlarged or reshaped, send a tracing of all exhaust ports, all bolt holes, and surrounding machined edges.  Put an arrow lettered UP on the tracing so we know which way is UP as on the head!  Tracings can be done by taping a piece of paper to the head’s exhaust surface and rubbing the bolt holes, port openings, and casting edges with crayon, carbon paper, the SIDE of a pencil lead, etc.  Remember that if you are PAYING US to build your headers (or make your header flanges) - sending us a tracing allows us to double check our header flange ports against your exhaust ports to insure best port alignment!  (Note that there can be a custom drilling charge assessed IF we must relocate the bolt pattern to better align the ports in the header flange to the ports in your tracing.)

  D.  Maximum Port Flow (if known):  Intake _________________cfm @ .__________________" lift;  Exhaust __________________cfm @ .__________________" lift


  E.  Location of Exhaust Ports.  Are your exhaust ports AND the related exhaust bolt hole pattern raised from factory location?

          Yes __________  No __________     If Yes, how much?______________________
               (There are cylinder heads that, in comparison to factory production designs, feature raised exhaust port AND bolt hole locations.  
                These changes can affect the selection of the header flange design and MUST be noted.)

  F.  (V-8 Chevrolets ONLY)  Which header flange port shape do you want?

          Round _________  Square __________  “D” shaped _________  Select whatever you feel gives the best port match _________

  G.  (Small Block Chevrolets ONLY)  Do you have Straight Plug ________  or Angle Plug ________ heads?

  H.  (290-401 AMCs ONLY)  Year of cylinder heads and/or shape of exhaust port:

          1967-1969 (Rectangular) ______________; 1970-1974 (Dog-Leg or “L” shaped) ______________

  I.  (352-428 FE Fords ONLY)  Number of bolt holes on exhaust side of head:  8______; 14______; 16______
               (Because there are several different heads in this engine series that have different port sizes AND different port locations - send tracing of ports and
                     bolt holes so we can double check header flange port alignment.  Mark UP on 8 bolt head port tracings.)

  J.  (383-440 Chrysler Products with aftermarket cylinder heads ONLY)  Do you have Straight Plug ________  or Angle Plug ________ heads?


  A.  Factory (horsepower rating) ______________ or After market (manufacturer’s name) ______________________________________

  B.  Cam Specs @ .050" lift or ______________" lift.  Rocker Arm Ratio ______________  Factory Rocker Arm Ratio ______________

        1.  INTAKE:      Valve Lift _______________"           Duration _______________o

                                  Opens _______________o BTDC   Closes _______________o ABDC

        2.  EXHAUST:   Valve Lift _______________"           Duration _______________o

                                  Opens _______________o BBDC   Closes _______________o ATDC

        3.  Overlap ___________o  Lobe Separation ___________o  Intake Lobe Centerline ___________o  Installed at ___________o

        4.  Lifter Type:   Hydraulic _________  Hydraulic Roller _________  Solid _________  Solid Roller _________  Other ____________________

        5.  MANUFACTURER’S DESCRIPTION of Cam Grind (Street, Street/Strip, Competition, Drag, Pulling, etc.)


             Give useful or recommended RPM range) __________________________________


  A.  Flywheel Material:  Steel_______  Aluminum_______  Weight__________  Manufacturer________________________________________

  B.  Small Block Chevrolets ONLY - number of teeth on Flywheel/Flexplate:  _________153  _________168

(There are two flywheel/flexplate sizes - 153 tooh and 168 tooth - used with the Small Block Chev engine.  This causes the starter to have two different locations. In some cases, to provide necessary clearances, we must build a header to match the starter location - therefore we need to know your flywheel/flexplate size.  If you are NOT sure what size you have, count the teeth and indicate that above.  For your information, 153 tooth flywheels are found on most engines including STOCK production 64-67 Novas.  168 tooth flywheels tend to be found in earlier cars (55-57 Chevs, early Corvettes, etc.), cars equipped with 11" clutches, or with Powerglide/Turbo 400 automatic transmissions.  Flywheel size can also be determined by checking the distance between the starter and the oil pan.  If the starter is about 1" or more away from the oil pan - you have the 168 tooth size.  If the starter is only about 1/4" away from the oil pan, you have the 153 tooth size.  (Distances are relative to using original factory production starters and oil pans.)





  A.  3-Speed _______  4-Speed _______  5-Speed _______  6-Speed _______  Manufacturer/Model__________________________________

  B.  Automatic (model, name of company preparing transmission, converter stall speed)


  C.  Transmission Ratios:  1st ___________  2nd ___________  3rd ___________  4th ___________  5th ___________  6th ___________


       Type/Model __________________________________________________________________  Gear Ratio ______________


       Size _____________  Width _____________  Diameter _____________  Manufacturer ________________________________  Tire Compound _____________




  A.  Is mid-range power important to you or your type of usage? _____________________

  B.  When in competition, give low/high limits of engine’s RPM range _________________________________________

  C.  Maximum RPMs used in driving/competition __________________

  D.  Shift points in RPMs:  2nd ____________  3rd ____________  4th ____________  5th ____________  6th ____________.

  E.  Drag Racing:  RPMs used at starting line: _________________  at finish line _________________

       Best Elapsed Time ________________  Best MPH ________________  Best 60 foot Time ________________

       Were these Best Times/MPHs turned with the car as described in this Questionnaire? _____________________

       If not, list changes made since then ____________________________________________________________________________________________________



       Expected BEST Elapsed Time and MPH (this is important) ___________________________________________________




  A.  Type of Fuel (Gasoline, Alcohol, Nitrous Oxide, etc.) _________________________________________

  B.  Outside Diameter of Exhaust Pipe (between headers and muffler) ____________________________________________________________________________

  C.  (Small Block Chevs ONLY)  List the side of the engine that needs brackets for mounting the alternator, generator, or coolant tank.

           Driver’s Side _____________  Passenger’s Side _____________

  D.  (Small Block Chevs ONLY)  If your car was originally produced with a manifold mounted generator/alternator bracket,
          your headers can come with a welded mounting bracket (that the factory bracket bolts to) but indicate here that you

           DO WANT_____________ or DO NOT WANT_____________ the bracket(s)

  E.  (1 7/8" Small Block Chevs ONLY)  Do you want us to use the optional Adapter/Reversion Header Flanges (extra cost!) when building your headers?

           YES _____________  NO _____________

  F.  Power Options (power steering, power brakes, air conditioning) _____________________________________________________________________________

  G.  Are you are still building this vehicle? __________________  

           If you are attempting to be ready by a certain date, please enter that date here _________________________

  H.  Driving/racing altitude (height above sea level) (We’ll assume that the altitude is under 1,000 feet if left blank.)  __________________________________________

  I.   Anything else we should know?  Any changes being planned that we should consider?



  J.  Are you using headers now?______________ If so, who made them?__________________________________________________

       What type of header design are they (Collectored, Zoomies, Tri-Ys, etc.)?________________________________________________

       Please list the dimensions of the headers you are currently using:  Lengths must be lengths as measured BY YOU - NOT measurements taken from a catalog!

           Zoomies (no collectors):         Tube Length_______________ Tube OD______________

           4-Tube Equal Length:          Tube Length_______________ Tube OD______________

           4-Tube NOT Equal Length:  Longest Tube ______________  Shortest Tube ______________  Tube OD ______________

           Tri-Ys:    Primary Tubes:        Longest Tube ______________  Shortest Tube ______________  Tube OD ______________

                          Secondary Tubes:    Longest Tube ______________  Shortest Tube ______________  Tube OD ______________

           4-Tube & Tri-Ys:                    Collector Outlet (OD) _________________  Total Collector Length ________________

       Other header information ___________________________________________________________________________________________________________

  K.  If you have headers on your vehicle now, what do you want the new headers to do?




  L.  We would like to know what caused you to contact us - our website, an old advertisement (magazine and specific issue, if possible), a new products release, a
       magazine article, etc.  If you happened to have been referred to us by another person or a business, we would like to know their name.  If you know someone
       already using our headers, if you have used our headers before, or if there was a  PARTICULAR reason that prompted your inquiry, please let us know that too!







HEADERS BY “ED” offers a Header Design Advice Service to help people make rational, intelligent decisions regarding the purchase or construction of a set of headers.  We offer this service because we see that most people make decisions based more on LACK of information rather than on an OVER-ABUNDANCE of information. (How many times have you said “If I only knew then what I know now!”?)  We all learn by our mistakes but quite often these mistakes can be painful (and EXPENSIVE!).  One of our Design Advice Service goals is to help customers AVOID these “hard” learning experiences.

Because of the time that it takes to render this Service, we have to charge for the Service (costs listed at the bottom).  Payment is made by either VISA or MasterCard credit cards (enter Card Number, Expiration Date, and CVV2 code at the bottom of this Questionnaire).  If our Design Advice gives you ONLY five more horsepower, that is actually VERY CHEAP horsepower!  If Headers, Header Kits, or Header Parts are ordered from us within SIX MONTHS of the Header Design Advice payment invoice date, the following schedule of full or partial credits will be applied to your order. Credit will ONLY be given for the SPECIFIC application described in this Questionnaire.  This credit is NOT transferable and can only be obtained by the person or business listed at the bottom of this Questionnaire.  (Please mention your Header Design Advice payment invoice number when ordering Headers, Header Kits, or Header Parts so that you get the amount listed below credited to your order.)

  Header Order Credit   $64.95 - FULL Credit Given  
  Header Kit Order placed within 15 days of Advice Receipt Date   $64.95 - FULL Credit Given  
  Header Kit Order placed 16-30 days after Advice Receipt Date   $50.00 - Partial Credit Given
  Header Kit Order placed 31 days or more after Advice Receipt Date        $45.00 - Partial Credit Given
  Header Parts Order ($250.00 or more)     $35.00 - Partial Credit Given
  Header Parts Order ($175.00 - $249.99)     $30.00 - Partial Credit Given
  Header Parts Order ($100.00 - $174.99)     $20.00 - Partial Credit Given
  Header Parts Order ($50.00 - $99.99)     $10.00 - Partial Credit Given
  Header Parts Order (Under $50.00)  $ 0.00 - NO Credit Given

Check here if you are interested in:  HEADERS ________  HEADER PARTS _____   or ADVICE ONLY _____

WHAT WE WILL DO:  Design Advice Requests are answered by mail in a 3-5 page letter plus 13 or more extra pages of interesting examples and explanations that are often referenced in the letter. Design Advice Letters are usually sent within 7-10 days of receiving the Questionnaire but this can change during the busier times of the year so PLEASE keep that in mind. Priority Service:  Quicker Advice Service (1-3 day turnaround) and Quicker Mail Delivery is available - see pricing information at the bottom.

WHAT YOU WILL GET:  Depending on the information you supply and which of the above three categories you select, we will recommend tube sizes and lengths and collector sizes (collector sizes and lengths should be experimented with by using straight and tapered collector extensions if you’re REALLY serious about performance).  If you already have headers and have described them earlier, we will usually include very specific design comments as to WHY we feel that our header design recommendations will further improve the performance of your vehicle.  If you are going to build your own headers, we will not only offer header design advice but will also try to give you additional specific construction and part purchase recommendations where appropriate.

COMMENT:  All advice given is based on thousands of “header design experiences” accumulated over the years.  All of our testing and experiences relate to our header designs that have always been Equal Length within +/- ½" on all tubes and that have also used our Cross-+- Entry collector design.  It is this design consistency practiced over many years that allows us to make accurate header design recommendations.  If you plan on building your own headers, incorporating these two essential design characteristics plus using our tube and collector recommendations will cause your headers to achieve exactly the same power gains that we would achieve if we were building the headers for you!  If you are going to use our advice to purchase a header from another company, please keep in mind that you are NOT buying OUR headers (our designs, our features, our quality, etc.) from them - you are buying THEIR headers from them.  We see lots of headers from big header manufacturers that are nowhere near Equal Length (many even represented as being equal length), are too short (for ANY type of use), have inefficient collector shapes, and even have header flanges that block off portions of the exhaust ports in the head.  We also see lots of poor quality headers that don’t fit well, are difficult to install, have poor spark plug accessibility, leak, etc.  Avoid being mislead by false claims, misrepresentations, ignorant comments, or assumptions - make sure that you get what you want!


Mail this completed Header Questionnaire to:

14525 County Road 31    Hamburg, MN  55339


   Credit Card              VISA _________________  MasterCard _______________

   Credit Card Number _______________________________________  Expiration Date:  ____________

   Amount to be charged to Credit Card

        _______ $  64.95  (U.S.A. Standard Advice Service/USPS 1st Class Mail delivery);
        _______ $  82.95  (U.S.A. Priority Advice Service/USPS Priority Mail delivery);

        _______ $  64.95  (Canada - Standard Advice Service/USPS surface delivery);
        _______ $  83.20  (Canada - Standard Advice Service/USPS Priority Mail delivery); 
        _______ $  98.20  (Canada - Priority Advice Service/USPS Priority Mail delivery); 

        _______ $  64.95  (Other Countries - Standard Advice Service/USPS surface delivery);
        _______ $  91.95  (Other Countries - Standard Advice Service/USPS Global Priority Mail delivery); 
        _______ $106.95  (Other Countries - Priority Advice Service/USPS Global Priority Mail delivery); 


           Mail Name  ___________________________________________________________________________

        Mailing Address - line 1 _________________________________________________________________

        Mailing Address - line 2 _________________________________________________________________

        Mail City _______________________________________  State _______  Zip/Postal Code __________

        Day Phone ________________  Cell Phone ________________  E-mail _______________________________________________________


        Ship Name _________________________________________________________________________________

        Shipping Address - line 1 _____________________________________________________________________

        Shipping Address - line 2 _____________________________________________________________________

        Ship City _____________________________________________  State ______  Zip/Postal Code  __________

        Ship Country _________________________________________________


        Billing Name ________________________________________________________________________________

        Billing Address - line 1 ________________________________________________________________________

        Billing Address - line 2 ________________________________________________________________________

        Billing City _____________________________________________  State ______  Zip/Postal Code  __________

        Billing Country _________________________________________________