Downpipes

[bigbaz1974]

Probably a silly question, if you go stage 2 and get replacement downpipes will the car fail the MOT emissions test. Do you need to remove it every time you go for an MOT.

Cheers

[MikeFish]

Most likely yes if they are catless. Sports cats will probably be OK though.

[bigbaz1974]

Was looking at a full miltek system with cat bypass downpipes, car is stage 1 at the moment was thinking about this and getting stage 2 map, bit of a pain changing it back to the cat every MOT just to gain maybe another 60hp

[MikeFish]

Yes i agree unless you have a "friendly" garage. Sports cats will get you close to that but obviously cost a lot more. Look at Footers recent post with milltek sports cats and stage 2 remap which netted him 745ps.

[Baywrasse]

I had this problem and it failed the emissions test. They did the test last and the 100 cell filter had cooled down to much even tho the car was idling I went back in with the exhaust very warm and it passed no problems. The mot station told me for next time ask for the emissions test to be done first.