Pulleys and grounding wires
I've got pulleys and grounding wires on my car but I'm not sure what exactly it is that they do. Do they add horsepower or do something else? Any help would be great!
2004 330xi Orient Blue on Gray leather. Premium Pkg.
HKS Cold Air Intake
Rockford Fosgate system two 12's and 1001 bd amp. Custom installation.
Carbon Fibre roundels
M3 Lip Spoiler
Aluminum Sport Pedals
Ultra Special custom phone holder from ************