Basically I have a bog standard 2.0 sierra and want alot more power from it. Its going for a service asap so hopefully that will give it a little more life but apart from an induction kit what else can i do under the bonnet that will give it a bit more grunt? Anything that wont rape me on insurance is the target here. A few ideas that have been thrown my way are a power boost valve and new cams... what do u think?