What is the CT-1 coating on these bearings?

The CT-1 coating is an advanced surface treatment applied by ACL. It's designed to reduce friction and wear, particularly during the engine's break-in period and under high-performance operating conditions, helping to protect the bearing surface.

Are these bearings for a stock or modified crankshaft?

These are standard size main bearings. They are intended for use with a crankshaft that is at its original factory diameter, meaning it has not been machined undersize for bearing replacement. If your crankshaft has been machined, you would need to select the appropriate undersize bearing set.

What is the importance of main bearings in an engine?

Main bearings are critical components that sit between the crankshaft and the engine block. They support the crankshaft, allowing it to rotate smoothly while maintaining proper oil clearance. This clearance is vital for lubricating the bearing surface and maintaining oil pressure throughout the engine.

ACL Nissan SR20DE/DET (2.0L) Standard Size High Performance Main Bearing Set - CT-1 Coated

Specifications

Brand: ACL
Part #: 5M2964HC-STD
UPC: 9315726457764

ACL Nissan SR20DE/DET (2.0L) Standard Size High Performance Main Bearing Set - CT-1 Coated

Name: ACL Nissan SR20DE/DET (2.0L) Standard Size High Performance Main Bearing Set - CT-1 Coated
Brand: ACL
Price: 137.72 USD
Availability: InStock

$137.72

On Backorder — Expected to ship by Jul 9, 2026

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

Fits 1991-2002 Infiniti G20. ACL High Performance Main Bearing Set with CT-1 coating for improved durability.

Key Features

Fits 1991-2002 Infiniti G20, 1995-1998 Nissan 200SX, 1991-1993 Nissan NX, and 1991-1994, 1998-2001 Nissan Sentra.
Standard size main bearings for SR20DE and SR20DET 2.0L engines.
Features ACL's CT-1 coating for improved friction reduction and wear resistance.
Well-built to support the crankshaft under demanding engine conditions.
Essential component for engine rebuilds and performance builds.

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Will this fit your vehicle?

Product Details

Already running performance upgrades on your SR20DE or SR20DET engine? This set of standard-size main bearings from ACL is the next piece of the puzzle for building a reliable, high-revving powerplant. These bearings are crucial for supporting the crankshaft within the engine block, and when you're pushing the limits, you need components that can handle the extra stress.

ACL has applied their CT-1 coating to these main bearings. This advanced coating helps reduce friction and wear, especially during the critical break-in period and under high-load conditions. They are manufactured to standard size, meaning they're intended for use with a crankshaft that hasn't been machined undersize. This ensures a precise fit and proper oil clearance, which is essential for oil pressure and engine longevity.

When rebuilding or modifying your SR20, using well-built internal components like these ACL main bearings is key to achieving your performance goals and ensuring your engine stays together. Make sure to follow the manufacturer's installation instructions carefully for proper seating and oil clearance checks.