Why not just go with the stainless works headers/y pipe? The headers AND y pipe are stainless steel with 1.75" primaries inch a 2.5 inch collector, along with dual 2.5" into a single 3" y pipe. The system can be had with and without emmissions. It's the ticket IMO.

 

I've already got the Jet Hot LT's and am not gonna go thru the hassle of uninstalling my Jethots and reinstalling some other headers. Especially since I'd probly get very lil for my Jethots compared to what the Stainless works headers cost ... so in short. Nah i'll just build a new Ypipe that fits my liking.

 

would there be a downfall to fabbing up a y pipe that is 3" all the way around except for the drivers side? The drivers side would be 2 1/2 .

 

I dunno exactly what the downside would be, but I'm sure it would have something to do w/ the fact that in the Y merge, the pass side exhaust velocity would be slower than the driver's side. You can run a 3" Y on both sides, I've done it before ... you just sacrifice ground clearance.

 

You want to have equal size pipes on your car. Don't run 3inch off one manifold and a 2.5 on the other. You want both sides to be balanced out.

 

would .5" inch smaller really be that bad? I wasn't thinking the entire drivers side just a small section of tubing underneath the drivers floor/subframe just enough to clear any bamging issues. I would've thought that would be the same *** the factory did on the drivers side.

 

Why not just make it 3" piping all the way. And make a small indent in the pipe where it would contact the frame.

 

I'm running a Stainless Works Headers with their catted y and putting down about 436hp and 414tq with a tr224 cam ls6 intake and PRC heads. They are 1 5/8's primaries, 2.5 inches all the way to the catback, which is a factory SLP d/d 3" Clearance is like stock

 

Nice numbers, but are you sure yours have 1 5/8" primaries? I know the current Stainless Works headers have 1 3/4" primaries.