sik94hatch

My '92 Si has a DC header, 4-2-1 1piece. The stock cat wont bolt onto it.

What aftermarket cat will?

92hatchling

let me guess the flange on the header id stright across ans the on the cat is at a angle.I had the same problem i just took it to a exhaust shop and the cut the header flange and reweled for me fits perfect now

sik94hatch

no, the hole on the cat is to small. wont fit over the header...

IHateJDM

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sik94hatch &raquo;</TD></TR><TR><TD CLASS="quote">no, the hole on the cat is to small. wont fit over the header...</TD></TR></TABLE>

I've never seen a slip-fit cat before...

just take it to an exhaust shop. They'll make quick work of it.

Jakester9500

Slip fit? Shouldn't there be a gasket in there somewhere? Sounds like an ebay special.

IHateJDM

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jakester9500 &raquo;</TD></TR><TR><TD CLASS="quote">Slip fit? Shouldn't there be a gasket in there somewhere? Sounds like an ebay special.</TD></TR></TABLE>

I was being sarcastic about the slip fit, but I'm pretty sure he was serious. But yeah, it either needs to be welded to the header, or weld a flange to the cat that matches the header, and use a gasket. Either way there is welding required, which is why I recommended an exhaust shop.

fmrprojects

take it to a muffler shop and have them flange it. make sure they dont weld it all together