Caddyslammed 16 Posted January 3, 2006 Report Share Posted January 3, 2006 i am thinking of fitting a milltek full exhaust system, now , they do a cat bypass pipe, my golf being 1996 has a cat and i would like to get rid of it, but am i right in thinking this will invalidate the mot, or at least i will have to put the cat back on come mot time? is it worth all the hassle, shall i just leave it on and get a cat back exhaust? Link to post Share on other sites
purple highline monster 0 Posted January 3, 2006 Report Share Posted January 3, 2006 you can get a high flow cat from miltek i think, & if you went for bypass you would need to swap it over for the mot. Link to post Share on other sites
Caddyslammed 16 Posted January 3, 2006 Author Report Share Posted January 3, 2006 thats what i thought, the high flow cats are about Link to post Share on other sites
silverline 0 Posted January 3, 2006 Report Share Posted January 3, 2006 i think they are more restrictive than a bypass but anything is better than the standard cat. Link to post Share on other sites
matth76 1 Posted January 3, 2006 Report Share Posted January 3, 2006 I have a high flow cat from Milltek plus their cat back exhaust system. My car now puts out about 192-195bhp on the rolling road with just those modifications. Yours should make similar figures. A cat bypass will invalidate your MOT but will make a little bit more power than the high flow cat, but not much. My high flow cat really makes the car much more responsive. How much is the Milltek cat bypass? Link to post Share on other sites
Caddyslammed 16 Posted January 3, 2006 Author Report Share Posted January 3, 2006 the milltek bypass is Link to post Share on other sites
fritzenberg 3 Posted January 3, 2006 Report Share Posted January 3, 2006 do the hi flow cats still have the thing for the lambda probe to go?do powerflow do hi flow cats too? Link to post Share on other sites
Caddyslammed 16 Posted January 3, 2006 Author Report Share Posted January 3, 2006 i dont know myself, someone here will know Link to post Share on other sites
matth76 1 Posted January 3, 2006 Report Share Posted January 3, 2006 I don't know about the lambda probe question. According to both Milltek and Stealth (who fitted mine) high flow cats should not affect other engine parts and should last as long as a standard cat. I would assume a cat bypass (decat) may have a bigger negative effect on the lamda due to it being more free flowing than a high flow cat. On the other hand a dodgy lambda can indirectly damage a cat due to over fuelling. Price for the cat bypass sounds ok. Link to post Share on other sites
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