What does '09 Oversize' mean for these bearings?

The '09 Oversize' designation means these bearings are 0.009 inches larger in diameter than standard bearings. This size is used when the crankshaft journals and/or the main housing bores have been machined to a larger diameter to correct wear or achieve specific clearances.

What is the material of these ACL Race Series bearings?

These ACL Race Series bearings feature a tri-metal overlay. This construction is known for offering a good balance of strength, durability, and conformability, which helps protect the crankshaft and maintain oil pressure.

Do these bearings come with installation instructions?

While these bearings are designed as direct replacements for the specified applications, it is always recommended to refer to the manufacturer's installation instructions or a reputable service manual for proper installation procedures and torque specifications.

Specifications

Brand: ACL
Part #: 5M829H-09
UPC: 9315726264300

ACL Chevrolet V8 396/402/427/454 Race Series 09 Oversize Main Bearing Set

Name: ACL Chevrolet V8 396/402/427/454 Race Series 09 Oversize Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-race-series-09-oversize-main-bearing-set-t14-4340828
Price: 118.77 USD
Availability: BackOrder

$118.77

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

ACL Chevrolet V8 396/402/427/454 Race Series 09 Oversize Main Bearing Set. This set is 0.009" oversize for engine rebuilding.

Key Features

Fits 1965-1974 Chevrolet Bel Air, Biscayne, Blazer, Brookwood, C10 Pickup, C10 Suburban, C20 Pickup, C20 Suburban, C30 Pickup, Camaro, Caprice, Chevelle, Chevy II, Corvette, El Camino, Estate, G10 Van, G20 Van, G30 Van, Impala, K10 Pickup, K10 Suburban, K20 Pickup, K20 Suburban, K30 Pickup, Kingswood, Laguna, Malibu, Monte Carlo, Nova, P10 Van, P20 Van, P30 Van, Townsman, and more.
Fits 1972-1974 Excalibur Phaeton and 1968-1974 GMC C15/C1500 Pickup, C15/C1500 Suburban.
Race Series main bearing set for Chevrolet V8 engines.
Features a 0.009 inch oversize dimension for use with machined crankshafts and blocks.
Tri-metal overlay construction for improved strength and conformability.
Designed to support the crankshaft in the engine block.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

About this part

Product Details

Doing an engine rebuild on your classic Chevrolet V8, like a 396, 402, 427, or 454? These ACL Race Series main bearings are a solid option for getting your bottom end back in shape. They're built to handle the demands of performance applications, and this set is specifically sized 0.009 inches oversize to help you achieve proper clearances when machining your crankshaft and block.

ACL has been making engine bearings for a long time, and their Race Series is known for being well-built. They use a tri-metal overlay that offers good strength and conformability, which is important for maintaining oil film and protecting your crankshaft journals. This particular set is designed for the main journals, which support the crankshaft in the engine block. Having the right bearing clearance is critical for oil pressure and engine longevity, especially when you're pushing an engine hard.

When you're rebuilding an engine, especially one with a larger displacement like these Chevy V8s, it's common to need to machine the crankshaft and block to ensure everything is perfectly round and within spec. These 0.009" oversize bearings are meant to be used after that machining process to achieve the correct oil clearance. Make sure to check your service manual for the exact clearance specifications for your specific engine build.