More BHP on 2002 4.4i
 

Guys,
I have recently bought 2002 4.4i with only 42k (genuine) on clock.What's the best way to improve my BHP without doing damage to the engine.Chip,Sports exhaust ,Supercharger.Can any of you give me a pointer here it would be much appreciated.

beldy

IMO, Dinanbmw.com has the best products. They have a number of solutions for your model.

Not much you can do to 4.4i other that Super charge kit, but it's going to hurt your wallet.

BTW, with traffic jam in Bangkok, not sure you'll need more than 295HP;)
Welcome to the forums.

I am told that a cold air intake, exhaust and ecu programming will be something like 20 - 30 HP and is a good value for money.

Dinan is good but expensive. I went another route: AFe, Remus, and a ECU programming. Totally changed the driving experience! Check this thread for more info: http://www.xoutpost.com/x5-e53-forum/...mods-week.html

Not to hijack, but...awesome looking X Zerochief ...very tastefully done :thumbup: :thumbup: :thumbup: :thumbup: :thumbup:

Cheers for the info

Also I have 20 inch rims with 295/45/20 all round(on when bought).Should the front tyres be smaller than 295 for better handling or keep all the same??

I think the same size is ok. Boston X5 4.4 thanks for the compliment!