stock sizes

[f-tothe-ill]

ok, I knew this at one point but with all the numbers i've been looking at lately I can't remember what the stock exhaust pipe diameters are. I also tried searching and couldn't find it like I did before.

could somebody give me a quick rundown of all the pipes (preferably in order) and their stock sizes on the v6 and v8 models?

[Niko97RS]

Re: stock sizes

pretty sure its

3.8L 2.25 from cat back
3.8L Y87 2.5 from cat back
5.7 3inch.

i could be wrong.

[f-tothe-ill]

Re: stock sizes

just to double check, its manifolds to y-pipe to cat to s-pipe to over axle to muffler etc correct?

y-pipe is 3" on all fbodies?

then the 3.8 is 2.25" the rest of the way whereas the 5.7 is 2.75"?

[IDoVoodoo]

Re: stock sizes

manifolds, to y-pipe (outlet is 3" but flat on top), to converter, to s-pipe, to i-pipe, to over axle, to muffler, etc. Those sizes are right. Never heard the y87 is 2.5" though.