S5x Performance S55 4-Pin Crankhub c63s turbos the material is not only

the material is not only beautiful to look at but serves the purpose of heat deflection as well

Its use is prohibited in any motor vehicle that is subject to emissions inspection or control

including low-octane oil vapors and contaminated fuel vapors

Strut Tower

S5x Performance S55 4-Pin Crankhub c63s turbos the material is not onlyBulletproof your S55 with the S5x Performance Pinned Crankhub. A must on all S55 engines, especially if you plan on tuning it! The stock hub is a known failure point in S55 engines. A failed hub that has spun will lead to incorrect engine timing which could potentially cause engine damage. The S5x Performance Crankhub is proven to prevent the hub from spinning. Our design incorporates a double locking, two piece assembly. Includes: S5x Performance 4