Hi all, I have an 05 E46 318 (N42B20) 143bhp.

It's a touch sluggish and I was wondering if anyone had any luck getting an extra few ponies out of the motor?

I'm aware that the 330, 325, 320 are all better engines and I should just buy one of those, but I'm not planning on doing that for motor tax related reasons.

I know a remap will do sweet fuck all as the car isn't diesel or turbo, but has anyone tried it and has it made any difference at all?

Is a new air filter the best I can hope for?

Thanks