cat by pass

[Starry]

does a cat by pass do much to the performance and if so is it just a case of taking it out and putting in a bit of pipe. i have a revo re-map and s/s miltek cat back. check out the pics on the link at the bottom of this mesage.

[kniterider]

miltek do a high flow replacement cat, but im sure ive seen some thing in c+r catalogue?? but from what i seem to remeber they were weld on types which put me right off!!! as it means u need a spare down pipe with your cat on to put on at mot time i havent even looked under m golf to see if the cat is part of the front section!! will have a gander 2morrow!!!!could do with one to let a few horses out of mine!!!

[Starry]

the down pipe and hi flow cat will set you back ?500ish. so im thinking of cheaper ways. i didnt know if the car will run right without a cat as theres a electronic thingymebob with a wire comming off of it...

[topher]

milltek cat and downpipe is about 390 + vat.. i'll let ya know in a couple of weeks how they perform. Went for this option simply because i dont want to have to re-fit a cat for MOT's... and the milltek cat accepts the stock lamda sensor just fine  

[Starry]

so how do they manage with the lamba sensor on cat by pass. does it need to be conected to anything??

[kniterider]

think it screws in new bypass pipe, im not sure!!! was gonna go and take some pics of me cat on the mk4 but raining bigtime so not today!!!!