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hey how is everybody, well I've just brought a Astra 1.8 sri 03 plate and I want to spend the next few months wages tuning it but i know nothing about it to be fair so thats why im here lookin for advice and help! At the minute im looking to improve the exhaust system from the manifold, its an...

hi i just recently brought an astra 03 plate 1.8 sri and i am after some advice on changeing the exhaust system, the engine is an ecotech and the manifold is part of the catalytic converter so i was wondering if it is possible to a) change the manifold and cat converter so they are seperate as...