Neejay

iTrader: (3)

I called DC Sports and he said the gasket for the j-pipe-to-cat was part number 18393-sh3-s00 (it also came with a paper gasket). When I asked him about the 2 front collector-to-j-pipe ones, he said to go to an exhaust store/shop and ask for a "2.25" 3-bolt gasket". Now, after searching I saw where someone said comptech headers used the same o-ring gasket for all 3 holes/locations (also 18393-sh3-s00 or fel-pro 60517). But I can't find (online) that same bolt pattern paper gasket anywhere. He was kinda hesitant/unsure.

Should I only use the o-ring gasket at all 3 locations, or a paper + o-ring somewhere? I took apart my header setup like twice, so now I have a leak. The collector to j-pipe connection WILL be slightly off. Both times I took them apart to try and re-position them and they ended up being the same both times. I think a paper gasket would make for a better seal if there's a guarantee slight offset of the flanges...

Neejay

iTrader: (3)

Well, in agreement with another post I found on here, I confirmed the parts needed:

QTY 2
18393-SH3-S00 O-Ring Gasket
QTY 1
RM-CB72 2 ¼” 3 Bolt High Temperature Gasket

All 3 openings are 2.25"-ish (as the 18393-SH3-S00 is a OEM p/n for the gasket from downpipe-to-cat). It's just that DC Sports recommends using a paper/metallic/whatever gasket for the downpipe-to-cat connection for some reason.

I'm going to attempt to use the paper gaskets for the front/rear banks-to-downpipe locations (since they appear to be the same size and bolt pattern), as there is no way for the regular o-ring gaskets to properly seal if the connection is off-centered.

EDIT: The gasket apparently fits:

1995 - 1998 2.5 TL
1999 - 2003 TL
1997 - 1999 & 2001 - 2003 CL
1986 - 2001 INTEGRA
1986 - 1990 LEGEND
1991 - 2005 NSX
1992 - 1994 VIGOR
2002 - 2006 RSX (NON TYPE-S)

Once I attempt to put everything together, I'll update the post for future reference of anyone doing a search.