MAHLE MS-2327H Engine Crankshaft Main Bearing Set H-Series Standard Size

The MAHLE MS-2327H is a Clevite 77 H-Series high-performance engine crankshaft main bearing set designed for the Chevrolet V8 496ci (8.1L) big-block engine. This set is part of the legendary Clevite 77 product line, a trusted name in performance and rebuilding applications for decades.

H-Series bearings are engineered for medium-to-high RPM applications, featuring a hardened steel back, medium eccentricity, and high crush for reliable retention. The bearings are narrowed to provide greater crankshaft fillet clearance, making them an excellent choice for engines equipped with crankshafts that have oversize fillets. Unlike some competing designs, H-Series bearings are manufactured without flash plating, which promotes better initial seating during break-in. This set also contains 1/2 grooved bearings for optimal oil distribution.

Originally developed for medium-duty truck applications using the Chevy 8.1L big-block, the MS-2327H is a direct-fit replacement and a step up in performance and durability compared to standard OEM bearings.

Key Features:

• Clevite 77 H-Series high-performance main bearing set
• Standard size (crankshaft undersize: stock)
• Hardened steel back with thin overlay construction
• Narrowed design for increased crankshaft fillet clearance
• No flash plating for improved bearing seating
• Medium eccentricity and high crush for superior retention
• Contains 1/2 grooved bearings for proper oil flow
• Suitable for medium-to-high RPM street and truck applications
• Direct fit replacement — no modifications required
• Alternate part number: MS-2327H-10

MAHLE is a world-leading manufacturer of OE and aftermarket engine components. Plastigage is recommended during assembly to confirm proper oil clearances before final torque.