Stay away from the power boost valve. they are snake oil. They only work on cars which actually need more fuel - i.e. 500bhp+ if im not wrong. I could be though. I just know they're rubbish.

And you should get a 52mm throttle body - the 56 is proven to be rubbish. Many other people will also back up this claim.

 

current exhaust probably losing about 2bhp. Induction losing about the same.

Throw them away.

56mm TB - waste of time.
Power Boost Valve - waste of time.

Spend the money on a service instead.

 

How will the exhaust and induction kit be losing power? Surely the less restriction should be making the engine more effiecient (and noisy)

 

Exhaust is a universal, so will actually be ******* up back pressure....the K series likes a bit of BP, it expects it...
Secondly, open cones suffer from heat soak, so you loose power rather then gain.
Plus, they both make your car sound like a dick.
Decent dampers and springs, and some better tyres will do wonders for handling. Leave the bolt on tat alone.

 

Sounds too good to be true - and it is

 

As 25Exec says, if you want to go fast, the money is better spent on tyres and suspension. It is amazing how well a stiff, well shod car will grip through a corner.

 

+1. Keep the little speed you can get through the corners. By far the best way of tuning imo. Means you can be more fuel economic as well Stay at a steady 56 EVERYWHERE