Sealed Power 129M Main Bearing Set Small Block Ford Standard Size

The Sealed Power 129M is a Speed-Pro series main bearing set designed for Small Block Ford engines in standard size. This complete kit features A-Series bi-metal aluminum alloy bearings with a small percentage of silicon mixed in with the aluminum and tin that make up the bearing-surface alloy.

Key Features:

• Silicon content resists wear while polishing the crankshaft journals during operation
• Bored Micro-groove design helps minimize debris embedding, which can score the crank's surface
• Standard size bearings for stock crankshaft applications
• Complete main bearing set for engine rebuilds
• Meets or exceeds OEM specifications

Sealed Power bearings are manufactured by Federal-Mogul, a longtime supplier to both OEM and aftermarket applications. The A-Series bearing technology provides enhanced wear resistance and surface hardness compared to conventional bearing materials, making these ideal for both stock rebuilds and performance applications. This bearing set is engineered for precise fitment and reliable long-term performance in Small Block Ford V8 engines.