GoldenWrench BMW B58 BLACKLINE Performance Engine Cap Set (M140i, M240i, 340i & 440i) Colour:Grey Using the stock turbo flange

Using the stock turbo flange is also supported

Inverted monotube layout for superior stiffness and steering precision under load

long paddles for BMW M3

standard shock cars only

motorway miles and spirited road use

GoldenWrench BMW B58 BLACKLINE Performance Engine Cap Set (M140i, M240i, 340i & 440i) Colour:Grey Using the stock turbo flangeThe upgraded BMW B58 Engine BLACKLINE Performance Cap Set is available in grey, blue or red. Meticulously designed and created in house to the highest precision and quality as 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 product family for the next generation of M Vehicles. Give the very plain plastic factory oil and coolant caps an upgrade with a brand new