kunkelz28

iTrader: (2)

So bought TSP headers only to realize later that all of there y pipes have a 2 1/2 inch exit? well its my fault for not researching I guess but will any other y pipes work with these headers?

HCI2000SS

iTrader: (2)

So where the y merges into a single pipe is only 2.5"?

dr_whigham

iTrader: (49)

Not at all. It's actually 4", but necks down to accommodate a stock exhaust if needed.

It's a simple 20 dollar mod, and for me, that included the stainless tig welding. Take a look here in a thread of mine.

https://ls1tech.com/forums/generatio...tall-pics.html

The part # and where to get it is on page 3

HCI2000SS

iTrader: (2)

Oh i see...yep I did something very similar to dr whigham with my setup as well

demonspeed

iTrader: (7)

I believe it's actually 2.75" OD. If only TSP would address this with the clamps they supply in the kit... all 3"!

Further, all catbacks will be 2.75" ID so as to work with the factory y-pipe -- even if they are 3" immediately after.

dr_whigham

iTrader: (49)

I modded that part too... Another 7 bucks

But yes, agree it's actually 2 3/4"