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      12-02-2011, 02:40 PM   #97
IMG
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Drives: E36 M3 Track car,Ess E90 M3 DD
Join Date: Feb 2008
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RD Sport makes large tube headers for the stroker motors. Only one stroker made 408whp, while all others made between 395-403whp on the Dynojet. A stroker with factory headers made 403whp. I'm not seeing any benefit even on a stroker.
Dinan has been working on headers for more than a year. Still haven't seen them hit the market.
Gintani made large tube headers an who knows what happened to them. One car hit the drags with them and didn't do anything spectacular.
Evolve went through some headers designs and I believe they finally gave up too after concluding there's no real gains to be made there.