you can get a 100 different answer to a wide open question like that, but the best way, is to do a little research...by using the search feature above...many, many, many threads about performance, and hp gains in there.... then choose the way you want to go....but, no performance chips out there....they have to be tuned by a pro...we have a few vendors on here....and you can talk to them as well....but, I will give you this, a cold air intake upgrade, a performance tune, a better exhaust system is a good start....search "TVT Kit" "Needswings" Mercedes Benz cold air intakes "Eurocharged" and lastly, Inmotion....there are threads about all these companies, and what they do...you choose....good luck, and welcome...