project.ng my car has four rings because my woman has zero

14Nov/094

JHM longtube headers have shipped!

I received word from JHM that my longtube headers have shipped. The JHM longtube headers replace the OEM headers and downpipes; other cars have been seeing both 20-50 ft/lbs and 20-50 AWHP gains throughout the powerband. JHM reccomends wrapping the headers with an exhaust wrap, I choose another route.

Performance Coating in Auburn, WA will be coating the headers with their satin black ceramic coating; we expect to see a temperature drop of 110-120ºF.

Read more about the headers on JHM's site.

Stock B6/B7 headers:

Stock_B6-B7_S4_headers.JPG

JHM prototype headers:

JHM_B6-B7_S4_Longtube_Header_Prototype_Almost_Complete_6.JPG

034 Motorsport dyno of stock headers and JHM headers; note the vehicle dynoed was an auto. Click image for fullsize.

V8_S4_Tip_Stock_JHM_Comparison

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  • marcabrown
    Good stuff!! Ditto on the results.
  • Brian C Mercer
    Can't wait to see the results
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