After the initial Air Filter and Exhaust system with De-cat. Which would make next to know difference BTW.
The best way to boost power on your 12v is to either put a low pressure turbo on it. You'd be looking at about £1000 and you'd get about 25-30 bhp or a 25 shot of nitrous for the kit you'd be looking at 500ish.
Or a nitrous kit with a nitrous controller and you could easily run 50bhp through your 12v how ever you'd be looking at closed to £1000 with the controller.
