Pud237

OK here goes:

First off, I wouldn't keep any of the induction side of things standard, just get rid of it all. No GTA intake, no airbox, just a CDA with a direct air intake from the front of the car, the MAF behind it and a nice insulated silicone pipe right to the throttle body. Sorted.

When it comes to exhausts, the further towards the back of the car the less it matters. Backbox won't give you as much gain as a decat, decat won't give you as much as sports headers.. Remember though, the exhaust and induction are tuned to certain rpms. To a big extent, a massive gain at high rpms will be offset by a drop in performance at low rpms. If your exhaust is nice and wide it will help the engine breath at high revs, but there'll not be enough back pressure to keep torque up at low revs. Its a balancing act really, depending on what you want from your car.

A few times now you've mentioned you really like the T.Spark because you can rag it everyday, it doesn't have too much power. I would go for a bit more of that, make it as peaky as you can and to hell with the bottom of the rev range because you won't be spending any time there if all goes to plan. Isn't that what a T.Spark is all about?