Alright there fellers my question i put to you is on my 14i merit astra i have a catalitic converter and a friend of mine who is a welder says he can make me a cat replacement pipe for nowt but will this give me any power gains?
my astra felt abit better with one on, and it wont do it any harm.
Might aswell get one done.
mines was from www.tuning.co.uk
im asking that same question to myself at the mo. Got a 1.4 mpi k-reg. Let me know what the result was if you do get it done would ya.