I will take 16hp and 22tq every day of the week. And that is just peak. I would imagine gains would be larger in most cases across the curve and hold on longer after peak as well.
On a stock motor its less
that test used the chit straight dump 318 type maifold
15 hp for 1k bucks for tti headers is not a great to me
900 bucks for spray 125 hp and 200 lb ft of torque sounds better its also on demand
Ive had headers on every sbm except this last 340
if you can run 11s with manifolds then pop the hood no headers the chebbie and ford guys can sulk something about that i like
