A3 1.8t sports cat

[a3_1.8_tish]

Hello everyone, hope someone can help??

Got a cat back milltek on my car at the moment but have been thinking of getting a downpipe sports cat fitted but not too sure about spending £600 on one??

Anyone know how much of an advantage they are and where i could find a cheaper one??

cheers for any replies

[davemk]

the downpipe is restrictive but the cat isnt tbh. I wouldnt waste money on a sports cat. Its been proven there are very little if any gains from one. The downpipe is worth while however.

[20vtel]

my brother recently went from a jetex 2.5" downpipe and sport cat to a 3" downpipe and decat and gained 9bhp on rtech's dyno. power went from 224bhp to 233bhp. I also have the same downpipe and decat fitted to my A3 1.8t and i cant reccomend it enough. Its very easy to fit yourself with very basic tools (2x 13mm spanners and a 17mm spanner) which is good because you will have to swap back to the original cat for MOT.

[zollaf]

your car is now illegal, but im sure you know that already. hope you dont get a roadside test.

[20vtel]

Yeah i know. I have had the decat on for about 2 years and i have never been pulled over for the exhaust being too loud (it isnt) or had a roadside test. I just need to spend 15mins under the car replacing the cat once a year.

[Phat_vento]

i bought a cheap de-cat / downpipe from ebay under a 100 quid!! again very easy to swap over and possibly one of the best cheap mods ive done!! but it definatelly wont pass an mot with it ive had it tested and it fails catastrophically with a de-cat!!