Gasket kit arrived today, 15 mins later holy $hit I did not expect this much improvement on the performance, to be honest I couldant belive it when it started up and ran perfectly.
Very happy boy :)
Its a tad loud, but that probably got somthing to do with the fact that thiers no exhaust system on thier yet lol.
I have a couple of questions though.
Firstly do you think that I would loose alot of performance once thiers a legal exhaust system on thier.
And secondly it would be a big help if anyone might be able to give me some sugestions on a good exhaust system to put on my car would be.
Thanks
Andy

Congratulations.

You won't loose any power with a good exhaust system (but it will sound slower).

Get a 1.75" turbo-type muffler and 1.75 exhaust piping. Such as:
* Walker Super Turbo WLK-17771
* Dynomax 17771
* Magnaflow 11123 14" Stainless Steel (is it too long?)
* Borla XR-1 BOR-40483 Stainless Steel, 1.75 in, 2.25 out

A larger size pipe out the back doesn't matter, but for most power keep it to 1.75 from engine to muffler. This is a stock to mildly built A14.

Ok thanks for that, and would you advise to run a muffler / backbox or go straight through?
Thanks

Having a box right at the end of the pipe is mostly looks, but might affect the sound a little. Currently I have a V8 muffler under the bed (tray) and a stainless cannon at the end. Sound is OK.

Ultimately for optimum performance I would put a resonator (small muffler) under the cab and a large muffler somewhere after that, wherever there is room. Generally the larger the muffler the quieter the exhaust. For maximum power at say 5000-6000 RPM you'd want a pipe to end about 33" from the valves. Easy way to end the pipe is use a resonator, because then whatever you put behind that point does not affect HP. You can fit huge or loud or quiet muffler at any spot after the resonator.