southard26 can anyone tell me if i do a remap will i see much gains on a standard car the only this that changed i the exhaust removed pre cat and put a straight through pipe after main cat its a vectra b z22se with delphi ecu on x reg
astra22bertoneauto Clean out your throttle body, fit a panel filter and a map will give you a small gain. a 4-1 exhaust manifold will give you a modest gain with a remap but they are lots of pennies.