BMW 530i 1977, Q Series Valve Seat Insert by QualCast®. Depth: 0.290". Seat Angle: 45°. The 4-digit part number is the cutter size as above. Actual O.D. of the seat is increased by the press fit for aluminum heads - 0.007 inches. QualCast high-chrome alloy designed for unleaded fuels which enables Rockwell Rc40 hardness combined with easy machinability. Features excellent resistance to high temperature corrosion in applications to 1150°F. All 20- and 21- prefixes without a suffix are cast in Q material.
|Seat Angle: 45|
- Made from high-strength materials for uncompromising durability
- Designed to provide an excellent combination of price and quality
- Fabricated on state-of-the-art equipment
QualCast®, LLC was founded in 1997 in Nashville, Tennessee. The primary objective of QualCast was, and is, to provide the engine parts aftermarket with the best quality products available in the world, at competitive prices, through the best service and most efficient distribution system. The QualCast Team based in Nashville Tennessee, USA are all dedicated to serving their selected customer base, to ensure the right parts are delivered efficiently and economically.