GoldenWrench BMW F Series M Car BLACKLINE Performance Coolant Expansion Tank Cap Cover Colour:Blue repeatable braking for fast road

repeatable braking for fast road and track day use while retaining factory electronics

Includes fixing screws or bolts to simplify replacement

Vehicle coverage examples

ACS side blades

crisp turn-in and real-world comfort on fast road use

GoldenWrench BMW F Series M Car BLACKLINE Performance Coolant Expansion Tank Cap Cover Colour:Blue repeatable braking for fast roadGoldenWrench Blackline BMW M Car F Series Billet Coolant Expansion Tank Cap Cover! These are Goldenwrench's most complex pieces created to date. Meticulously designed and created in house to the highest precision and quality seen on Goldenwrench's other products giving the factory units an all new form factor. We bring to you the newest addition to the BLACKLINE Performance product line for your BMW M Vehicle. Give the plain plastic factory coolant