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Re: 2 1/8" Header options
The Dynatech's are 2 1/8", they're gonna fit whether they want to or not! When the motor was dyno'd I didn't have these headers yet, so it was dyno'd with a 2" header w/3" collector. It made 785hp/705tq. Builder & dyno operator concur that the 2" pipes cost me anywhere from 15-23hp, That's why I was pretty set on finding some 2 1/8" x 3.5" headers and making them work.
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Adam
1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac
1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's
1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac
2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80
2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac
 
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