the second dyno is the arh which gained 32 to the wheels and 26 rwtq
i've read and seen kooks gaining up to 36-40+ rwhp, maybe not be as much on every setup since not everyones setup is the same, headers will do alot, the way they're built will do even more, also the way they are constructed,nice gains can be had from them..BUT the build also plays a big roll in it also you gott a have the engine for such huge primary headers.
i'm with gmctruck i myself have been through several exhaust changes from Y pipes to duals to straight duals on each side ( passenger/driver ) the less bends the better flow you'll get, i am sure everyone knows that, i think stewart posted some pics with his kooks next to his old pacesetters, i need to find that picture you'll see why kooks are so high and work so well
you can take this whole thread for what its worth, (NOTHING) it all depends on what you want, do you want average ( good for looks ) or do you want true performance? myself i am in the hobby to go freaking fast !!! so if its small gains or huge gains i go for the most i can get.
you gott a have the engine for such huge primary headers.
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