whats is in a cat?/sti back box
#1
i have been told that a cheap way to bypass a cat is to knock or push a pipe/bar through the exhaust thus opening up the honeycomb structure. can this be done? also what is in the design of a sti back box that makes it soooooo quiet even tho it has a big bore.
#3
I've been thinking sort of the same thing.
I've got a STi embossed tailpipe backbox kicking about in my garage. I was thinking about taking it to the local welding company and asking them to cut it open, take out the insides and put a stright through pipe inside.
I assume it would be like not having a backbox fitted, performance wise etc.
Or is there something nasty that could happen ?
Apart from your ears bleeding from the noise and annoying the neighbours.
Kevin
[Edited by kevin stanton - 7/13/2002 11:25:47 AM]
I've got a STi embossed tailpipe backbox kicking about in my garage. I was thinking about taking it to the local welding company and asking them to cut it open, take out the insides and put a stright through pipe inside.
I assume it would be like not having a backbox fitted, performance wise etc.
Or is there something nasty that could happen ?
Apart from your ears bleeding from the noise and annoying the neighbours.
Kevin
[Edited by kevin stanton - 7/13/2002 11:25:47 AM]
#5
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I have never done it with a scoob, but once encountered an old Cavalier 16v with a cat that had broken into three bits and was making horrible rattling noises. Pushed the bits out with a metal bar. Rattling stopped. Car went noticeably faster. Fuel economy improved about 10%. However, when the "empty" cat box was replaced with a Magnex de-cat centre section, it went even better
Yes, it is kind of a honeycomb structure.
Phil
Yes, it is kind of a honeycomb structure.
Phil
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