As you guys seem to be the dogs b*llocks when it comes to this kind of stuff and have really helped me in the past -
Just after some advice on what mods I could make to improve the performance of my pretty standard MK4 99 Astra 1.6 16v.
Do things like new air filter make any difference?
Any DIY tips or parts advice would be hugely appreciated.
Also wouldnt mind a nice sounding exhaust so any suggestions would also be nice.
Thanks in advance