Fel-Pro 2918 is a performance rear main bearing seal built to control oil leakage at the crankshaft on compatible Buick V6 Stage II and Chevy big block V8 engines that use a 2-piece rear main seal. Its fluoroelastomer construction is suited for heat, oil exposure, abrasion, high crankcase vacuum, elevated temperatures, and high RPM operation, making it a practical choice for performance builds and demanding repairs where the sealing surface may not be perfect.

Fel-Pro 2918 Features:

• 2-piece rear main seal design for engines originally equipped with a 2-piece rear main sealing arrangement.
• Premium fluoroelastomer material helps resist engine oil, heat, and abrasion in performance and severe-duty use.
• Engineered for high-vacuum crankcase conditions, elevated temperatures, and high RPM environments commonly seen in racing and performance engine builds.
• Sold individually for servicing one rear main seal location.
• Package dimensions are .30 in. depth, 13.10 in. height, and 8.00 in. width, with an approximate shipping weight of .15 lb.

Designed for real-world repair work on imperfect sealing surfaces as well as performance engine assemblies where crankcase vacuum and operating temperature can stress ordinary rear main seals.

Fits Buick V6 Stage II 2nd and 3rd design applications, Chevy big block V8 engines with a 2-piece rear main seal in 396, 402, 427, 454, and 502 cid displacements, and referenced Chevy MerCruiser 8.2L V8 502 cid applications. Confirm the engine uses a 2-piece rear main seal before ordering, and verify marine applications because available fitment sources do not all list the same coverage.