Indy_Woody

Okay! Was about to attempt to fit my beautiful Mugen exhaust (courtesy of Chrisr111).
I currently have a Skunk2 megapower system, which I fitted with the help of a mechanic friend (which means he fitted it while I passed him things)...... But I'd like to think I have enough mechanical knowledge to attempt it myself this time! I have read something about a ring gasket that fits between the cat and the exhaust. Does this need to be replaced? i dont want to get the system off, only to find I need a new "ring" gasket, especially now my local stealer is closed.

Although I may just pay someone to fit it for me next weekend...... but I may have to still get one of these gaskets..... or can a normal gasket be used?
Thanks in advance.

MB

Hi, the ring gasket is between the manifold and cat, so you don't need to touch it. Where you disconnect your existing exhuast from the cat, there is a flat gasket, or gasket paste can be used. Or you can reuse whatever is in there.

MB

unclefester

I thought it was a crush gasket? I changed mine when i fitted the new exhaust as a new one was pennies

mikey k

To clarify MB is refering to the doughnut on the front of the cat
There is a triangular crush gasket between the cat & first box - I'd replace it
There is also a copper crush o ring at the joint between the two back boxes - again I'd replace it
Upto you - you might get away with some jointing compound on them

perky.8952

I was wondering what the small pipe coming off the exhaust near the cat does, i am thinking about get an after market exhaust and some i been looking at have this pipe to???

jimmyb1978

it has a fancy name but its supposed to help the resonence (spelling), if you take it off I think it changes the sound for the worse they say.

May invidia has one and a lot of other aftermarket have one inbetween the back boxes

chrisr111

AFAIK it's not a crush gasket. The ring fits in a channel on the exhaust side. It's exactly the same type of gasket that Mugen supplies for the joint between the two rear sections. I've never replaced one and have changed exhausts several times without problems.

There is no OEM Honda triangular gasket. If you had one Mikey, it was aftermarket and probably supplied with your decat/high flow cat.


It's called a Helmholtz resonator.

Chris.

unclefester

It's a round soft metal ring. Looked like it would allow some small degree of movement in the pipework without causing a leak, it looked like it crushed it as it was tightened up or maybe it's just sprung into place under compression? For the price it was, it seemed churlish not to replace it, same as the gasket that goes between the cat and the downpipe - i think the whole lot including all the sprung bolts etc was less than 15 pounds.

Indy_Woody

Thanks for the help..... although.... I'm still confused! are we saying it is a small ring gasket between cat and exhaust?