AMS3
Full Access Member
I'm thinking about replacing the stock manifolds with Kooks long tube headers and 3" stainless exhaust with no Cats or Resonators. Will this hinder the hp of my engine, or give it more hp?
Not sure what you mean by "post cat shims". What tuner do you recommend? I'll be having a Speed Shop do the work, as my knowledge of welding and tuning is about the size of a pea.You will get a boost. BUT it will take a tune and some post-cat simms or a tweak in the tune to eliminate them.
Not sure what you mean by "post cat shims". What tuner do you recommend? I'll be having a Speed Shop do the work, as my knowledge of welding and tuning is about the size of a pea.
I don't have to worry about DMV emissions testing where I live ( GA ) and want as much unrestricted flow as possible.I don't know if Kooks provide gaskets with their long-tubes, but I'd use the o.e.m. exhaust manifold gaskets for best results.
Why do you want to run without cats anyway?
Ahh yes, now I know what you're talking about. My last truck was an 05 QC Ram 1500 with the Hemi. I had Kooks headers and one of the O2 sensors was removed because I deleted the Cats. Engine light stayed on, but I didn't notice anything as far as loss of power, etc. The speed shop wanted $300 to make the light go out. I said no, I can live with it on.That would be post-cat O2 [ after the cats, downstream, etc ] sensor SIMMS [ no H ] ... If you remove the cats you either have to fool the PCM about the presence of the 2 post-cat or downstream O2 sensors and the results they provide about the condition of the cats, or get a tune that causes to PCM to not have a problem with them being missing.
I don't have to worry about DMV emissions testing where I live ( GA ) and want as much unrestricted flow as possible.