King Engine Bearings MB1284SV0.25 Main Bearing Set Undersize - 0.25mm

The King Engine Bearings MB1284SV0.25 is a precision-engineered main bearing set designed for professional engine rebuilding applications. This bearing features King's SV-Series construction with a 0.25mm undersize specification for use with reground crankshafts.

Key Features:

• SV-Series aluminum-based bearing material for enhanced durability
• 0.25mm undersize for reground crankshaft applications
• Precision finished wall thickness with King's Bull's Eye Tolerance of ±0.0001 inches
• Lead-free aluminum construction for environmental compliance
• Superior embeddability to protect against contaminant damage
• Steel backing with aluminum bonding layer for maximum strength
• Manufactured in-house with rigorous quality control throughout production

King Engine Bearings has been the industry leader in precision engine bearings since 1960, producing bearings for automotive, marine, aviation, and performance applications. Each bearing shell is stamped with size identification on the steel back for proper installation verification. Designed for professional engine rebuilders who demand the highest quality and tightest tolerances available in the aftermarket.