Need more power

[Nige_RS4]

It's the same I'm afraid (and the RS cats are high quality units), so unless you can get 100cel cats through your MOT/emissions tests then stick to what you've got unless you want big power, then larger downpipes will help.

Spark plugs = RS2 items will be a good choice.

[matias]

So the next step would be, Milltek 3" cat back, RS2 sparkplugs, maby a bigger fuel pump, new map to about 1,5 bar?
What about Wather/methanol kit from VAST?

[Blue_Thunder]

Couldn't hurt!