Hey guys, new to the forum, but ive had my VRS over a year now and just had to put it through its first MOT. Anyway after replacing a few bits it passed, but failed on emissions... its suppose to be 0.3 CO for a pass, but mine was up around 0.6 so it was double....I had a look under the car at the garage and noticed it had a decat pipe on it with a performance exhaust so no surprise it failed!

 Im tempted to buy a 200 cell sports cat, though due to lack of funds im worried  it might not bring the emissions down enough, otherwise it means playing it safe and buying a 400 cell with a hit to performance :/

I just wondered if you guys would know the difference in emmisions between decat, 200 cell and 400 cell? And whether a 200 cell would bring my emissions down by 0.3? 

Many thanks

Hi. I have a 200 cell sports cat on my vrs passes the mot but I did find you have to get it really hot first. Take it for a good blast up the road before doing the test and it should pass fine 

Hi Gazz87

 

Did you finally get you car through the mot ? and did you have to fit a 200 or 400 cell cat to do so ? l ask because at the speer of the moment  lve just bought a mk1 octavia vrs thats been highly modified (with at least a miltek decat exhaust system and remap) and lm now worried about mot problems with emmisions as l know they struggle even when in standard form.

 

Regards Kerry

I used to run a 200 cel sports cat on mine and it always passed the emissions test with no problems, wasn't far off the figures produced with a standard cat. 

 

If a 1.8t still fails with a 200 cel cat, it's something else causing the problem. 

Edited 26 July, 20205 yr by niceyellow vrs