There seems to be slight hissing noise coming from my stillen y-pipe where the slip joint is, so i want to change it out.

Could I purchase another aftermarket y-pipe to replace it?
Or even use the OEM y-pipe with the Stillen midpipe and mufflers?

 

You can use the OEM Y-pipe or aftermarket Y-pipes As long as they are designed in the same fashion as stock (Same size flanges and dimensions).

 

why not just go to an exhaust shop and get new flex joints welded in? that's what i'm doing with my fujitsubo ypipe since theyre both scraped to hell and leak..

 

Megan hr y pipe.. eBay has them for like $160 shipped..

 

So a megan y-pipe will fit with the stillen midpipe?

 

Just wanted to give an update.
I removed the crappy u-bolt provided by stillen, and replaced it with a t-bolt clamp.
Hissing noise gone