Have a lead on a Y-pipe off of a 02 WS6, will it bolt up to my stock 99 Z-28?

The Y-pipe is an SLP for stock headers, exhaust

I know they changed headers in 2000 or so, but are the y pipes the same

 

no the pipes are diffrent

 

Exactly how?

If it's the rear length, who cares? A little welding, all is well. On the other hand, if flanges up front are wildly different, might be more trouble than it's worth.

Anyone who knows EXACTLY how they are different, please post. I just scored a 02 SLP y-pipe and have a 98 SS 'vert. I can mod a bit to make it work, but don't want to get crazy.

 

The earlier LS1's didn't have a ball/socket flange on the passenger side. The newer ones do. You can always make it work with fabrication. But, stock for stock, bolt-up replacement - it won't work unless you get a passenger cat from a newer f-body with the other end of the flange. Aside from that portion, it should be the same dimensions everywhere else (drivers side, i-pipe end).

 

Cool, thanks! It so happens I can probably score a later pass side cat no problem... other guys are frequently doing long tubes. Yup, I will too, later. For now, cheap to free is sweet...