Hi guys

can anybody tell me which make would give me a boost in performance

Well I put a Scorpion on my old T-Cat and it definately made it feel freer.

To be honest you just need to choose you preference in manufacturers as most will be good enough.

The scoprion didn't need rejetting it worked fine, that'll be the one problem you'll get with some exhausts.

I bought mine with an Akrapovic slip-on fitted. I've currently got a Venom Stubby fitted and it goes pretty well and is loud enough to wake the dead.

Rejetting is necessary to get the most from any exhaust but you should see a fair improvement even without altering the mixture.