milltek exhaust, cat bypass

[Caddyslammed 16]

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?

[purple highline monster 0]

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.

[Caddyslammed 16]

thats what i thought, the high flow cats are about

[silverline 0]

i think they are more restrictive than a bypass but anything is better than the standard cat.

[matth76 1]

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?

[Caddyslammed 16]

the milltek bypass is

[fritzenberg 3]

do the hi flow cats still have the thing for the lambda probe to go?

do powerflow do hi flow cats too?

[Caddyslammed 16]

i dont know myself, someone here will know

[matth76 1]

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.