aFe Power • MSRP: $397.95
Add horsepower with a bolt-on kit for the E9x BMW M3. The aFe pulley is designed to add 10hp and 7 lb-ft torque but we’re assured it doesn’t modify the factory harmonics or damping. The part is CNC-machined from billet aluminum and black anodized for durability. It comes complete with the bolts and belts to fit it.