It can be installed externally or in-tank using optional hardware that is sold separately (see part numbers

CP-Carrillo pistons have become the benchmark for engineering and design

CP-Carrillo represents the highest quality pistons on the market

There are 4 interchangeable 10-32 threaded vacuum port fittings provided to cover all scenarios

E46 M3 Track-Spec Carbon Fiber Hood upgrade It can be installed externallyTrue Carbon. Track Proven. Made in the USA. Built for serious drivers and competitive builds, the 5150 AutoSport Track Spec Carbon Fiber Hood for the BMW E46 M3 is engineered for performance without compromise. This isnt a fiberglass core with a carbon overlayits a true, full carbon fiber hood, manufactured entirely in the USA using aerospace grade materials and motorsport grade craftsmanship. Designed to reduce front end weight and improve cooling