(8) Exhaust Valves

or building a race or rally car

Trusted by engine builders worldwide for high-horsepower applications

a recognized leader in performance coatings

60mm Exhaust

N52 Combustion Chamber Upgrade Service F91 M8 (8) Exhaust Valves5150 AutoSport Combustion Chamber Upgrade Service for BMW N52 Engines Please note that price is based on customer providing core. If you need help sourcing a core, please contact our sales team. Our CNC Cylinder Head Combustion Chamber Service is a precision machining process where the combustion chambers of an engine's cylinder head are reshaped and refined using Computer Numerical Control (CNC) technology, optimizing engine performance for street or