[mav1178]

Originally Posted by rfbokle

Thanks! What size is the stock cat flange? Not sure if this hks sport will mate up to it. I think the piping on the hks is 3" and I think the 240sx flange is like 2.5", not sure though.

doesn't matter, all the catback exhausts have the same 2 holes for use with stock or stock replacement cats or test pipes.

for nonturbo exhausts it is the same 60.5mm piping all the way through