Re: Doing exhaust on 5.7L WK...What's your opinion?
Originally Posted by jeepgcoman
Gojeep, that sounds about right, depending on muffler(s), cats. and tubing size(s). I was figuring on mine ~30 hp, as my elapsed time at the drags went down ~.3 second after the install. The old drag racers rule of thumb was 10 hp. increase for every tenth of a second reduction in elapsed time.
I think you are right on the money with the 30 hp as the dyno results I found were improvements on the 6.1 WK's which has a better manifold to start with than the horrible log of the 5.7.
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