Hello, coming back from paris the few weeks ago and i managed to hit a nice 135

down one of there toll roads, but i want to go faster, i also want to get a bit quicker acceleration out of it.
At presant all i have done it stainless steel exhaust from Cat back and a Powertech Stainless steel Induction kit.
I know i could chip it but does it actully do much to the BHP as £250 is pricey
I thought about selling it but love it to much lol!!!
Any Ideas would be great?
Cheers