Thanks for all this advise and info your all being very helpful
I just need to start ordering parts also going to speak to jgm at some point and see what he says as ill most likely use him.
I just checked the racedynamix link leeroyv put up on there it states that a filter, sports down pipe cat, remove centre cat and 3 port solenoid should see 270bhp??
also If I do remove up pipe cat I read somewhere that I should not refit temperature sensor is this right?