at the moment i run a 2l vectra sri 140which i am trying to tune a bit. ive done the air box mods,zorst,ekotek valve ,k+n, and looking into enlarging the ports for inlrt &exaust to match the gaskets. any of you good peeps fitted adjustable cam pulleys to standard cams? any results ?? or just awaste of t+m again.
any tips greatfully recieved cheers