sky-chicken

Have the same problem with 15000 mile. Cat is rattling at warm up and in certain rpm range. Where to buy the testpipe ??
Anyone selling a used one ??

RT

Which after market exhaust you running? HKS?

VTEC Racer

Same here. I get an annoying rattle upon warm-up. HKS exhaust.

RazorV3

thats a good idea but its illegal in some states, and it won't pass emissions testing. just to let you know.

actually, im running open header with my accord now(top end is incredible, but lowned torque sucks) and only install the whole exhuast system when its time for emissions

RT

HKS has some seriously sh!t welds. Half the welds inside my resonator had broken free and I was getting rattling at all different RPM's. I ended up filleting the resonator open and running full beads where the perforated pipe meets the solid tubing (HSK only used 3 or 4 tacks welds )

vapors2k

I'm running a custom piece with no muffler. It's sad when with a loud exhuast, you can hear the rattling cat. It's also embarrasing b/c older used cars make as much noise as my clunker on warm up. Have you guys checked how much our cats cost at the dealer? yes...they list for over $800. what a joke.

vapors2k

[QUOTE]Originally posted by hecash
[B]vapors2k,

Have you taken out the O

Asura

I am curious to see how many people with deteriorated cats have leaned out their fuel mixture with either an aftermarket ECU or piggy back controller? Could the leaning be the cause of the failing cats? BTW, mine is making rattling on start up. I thought it may have been the exhaust. I'll take off the heatshields and see if that helps.