Ive recently bought a 320 Coupe with the full Schnitzer outfit, i used to own and M3 previously but the insurance limited me to owning it for just the one year!
My 320 is a sports auto, im considering having a home tune/service with one of those vans where they plug in the engine and run a diognostic, change the plugs, etc, has anyone else had this done and did it improve the performance / economy of the car??
Also my 320 has a K&N filter on it, i dont particularly like it as i dont think it does anything but create abit of extra noise, also it doesnt have a cooler box mounted around it..should i go back to a standard BMW air-filter?
your comments very much appreciated!!
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