Originally Posted by Ruby_Ridge

Exhaust manifold what? What am I missing here? I should install a new single exhaust manifold? lol, connorfx4 what are you talking about? Kinda like the other guy that said the passenger side will fail. Passenger side what will fail? Cup holder?

Originally Posted by bbrad1775

I would definitely invest in long tube headers since you are going to straight pipes. As for the 3" pipe, I would not. The increased flow will reduce your low end tourque and will feel like a turd taking off. Stick with 2.5". As for H or X pipe, H pipe has been known to produce more low end tourque and X pipe increases top end at WOT.

If you are strictly going for sound stick with stock headers, 2.5" pipe and H pipe. Probably won't see too much power improvement. Maybe a little get up and go off the line and throttle response passing someone.

Also what are you going to do about the O2 sensors running true duals?

Just my 2cents.

Originally Posted by bbrad1775

The manifolds are known to crack easily on these trucks as well as blowing out gaskets.

Originally Posted by Ruby_Ridge

bbrad1775 thanks for the feedback. Exactly what I was looking for. I wasn't for sure if this was a 2 into 1 then the O2 sensors, or like my GMC and Chevy that have independent cats and O2 sensors on each side. If it in fact is a Y with the sensors after the Y then I will leave it 1 single pipe all the way back and simply swap out the muffler for the Borla ATAK. I haven't looked into what is involved with sensors only running on 1 side.

Originally Posted by Ruby_Ridge

Oh' okay, thanks for the info. I was actually talking about "mufflers", but thanks for the heads up. She only has 28K miles on her so I would like to think that I'm a ways off from cracked manifolds.