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110 Posts
We have had some good results from our Custom 4-2-1 H22A headers, made 204 whp and 166 ft lbs of torque with just i/h/e p28 crome. So I am looking at my spare D16 engine...and think I can make a similar 4-2-1 D series header...anyone in here have a really good healthy NA setup and would be willing to try our header and see if it will really make power? Dyno? It would be designed for stock to decent NA builds...my goal is for it to produce more power then your typical headers DC/Greddy... PM or Email me or AIM me for details... www.ExplicitSpeedPerformance.net
I am thinking small primaries up top like our H22 header and then opening it up...
1 5/8" then tapper bored into 1 7/8" runners then into a 2 1/4" collector or 2.5" collector... I know a few of you guys are stepping up to the 2.5" collector and exhaust...our headers are pan huggers about 1/4" so drop it like it's hot with no worries...
What the header would look like...
I am thinking small primaries up top like our H22 header and then opening it up...
1 5/8" then tapper bored into 1 7/8" runners then into a 2 1/4" collector or 2.5" collector... I know a few of you guys are stepping up to the 2.5" collector and exhaust...our headers are pan huggers about 1/4" so drop it like it's hot with no worries...
What the header would look like...