Not much. Induction is supposed to be near on its best already, just a panel filter in the standard box with an air deflector on the slam panel from an auto. Remove the resonator box from the side of the air box for the induction noise.

Everything else ties in to one another. Cam pulley and remap. Exhaust is pretty much spot on stock but not made from a top grade of stainless. Some report loss of power with a decat. Remap makes it more driveable, irons out flat spots etc..

There was a guy on another forum that did everything possible and made something like 1.7hp over factory figures!

Spend the money elsewhere IMHO, uprated brakes, bushes, ARB etc..