Whether you're optimizing your M20 engine for the drag strip or street use

Big Bearing (44

Coolant Block Off Front [use factory bolt and O-Ring]

- ARP Custom Age 625+ Head Stud Kit- Genuine BMW Head Gasket- 5150 Xtreme Duty Cylinder Sleeve Set- CP x 5150 Pro-Xtreme Forged Piston Set    - Heavy Duty Piston Pins    - Optional: Add Skirt Coating or Dome Coating- CP-Carrillo x 5150 Pro-Xtreme Forged Connecting Rod Set- 5150 High Performance Main Bearing Set

the first mass-production unit to feature Precision's groundbreaking CEA® compressor wheel technology

BMW S85 Valve Springs by SuperTech SCR14811 Whether you're optimizing your M20SuperTechs high performance valve spring kits are precision engineered for BMW S85 engines, delivering superior valve control and reliability under high stress conditions. These kits include all necessary components for installation and are a direct replacement for BMW part numbers 11347837681, 11347835154, and 11347838295. Built to withstand the demands of high lift camshafts in the E60 E61 E63 E64 M5, these valve springs are made from premium