are there any cost effective ways to add some hp to my friends 2002 e430. its been very well maintained but has 122,000 miles, are there any aftermarket air intake and exhaust parts to help get a little more speed out of this bad boy?
thanks

 

I have an E430 and used RESTORE oil and it has made a change. You can get this on Ebay.

 

Here are a few tuners.

1. AMG
2. Lorinser
3. Brabus
4. Kleeman
5. Carlsson