williams decat and chip

[scotte666]

are both these things worth doing ive been told they give noticable improvements

 

[Jase16v]

De cat defo. Depends on the chip and setting up?

 

[Tucks]

I had a de-cat pipe on mine for a while,but it made the car very loud so I changed it back. It went slightly better at the top end of the revs,bt became ever so slightly less responsive on pickup.If you dont mind the noise though,its a cheap mod.