What does 0.25mm undersize mean for these bearings?

This means the bearings are slightly smaller than the standard size. They are intended for use when the engine's crankshaft journals have been machined down (ground) by 0.25mm during a rebuild. This ensures the correct oil clearance and fit.

What is the CT-1 coating on these bearings?

The CT-1 coating is a special surface treatment applied by ACL. It helps to reduce friction and improve the bearing's ability to maintain an oil film, which is crucial for protecting the bearing and crankshaft under high loads and temperatures.

Do I need to buy anything else to install these bearings?

When installing rod bearings, it's standard practice to also replace the connecting rod bolts, as they are often torque-to-yield and not reusable. You will also need new engine oil and an oil filter for the final assembly.

ACL Nissan SR20DE/DET (2.0L) 0.25 Oversized High Perf Rod Bearing Set - 17 wide - CT-1 Coated

Specifications

Brand: ACL
Part #: 4B2960HC-.25
UPC: 9315726457382

ACL Nissan SR20DE/DET (2.0L) 0.25 Oversized High Perf Rod Bearing Set - 17 wide - CT-1 Coated

Name: ACL Nissan SR20DE/DET (2.0L) 0.25 Oversized High Perf Rod Bearing Set - 17 wide - CT-1 Coated
Brand: ACL
Price: 71.08 USD
Availability: InStock

$71.08

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Fits 1991-2002 Infiniti G20. ACL 0.25mm undersize rod bearings with CT-1 coating for improved performance.

Key Features

Fits 1991-2002 Infiniti G20, 1995-1998 Nissan 200SX, 1991-1993 Nissan NX, and 1991-1994, 1998-2001 Nissan Sentra.
Set includes rod bearings sized 0.25mm undersize for use with a ground crankshaft.
Features a 17mm width, standard for SR20DE/DET applications.
Coated with ACL's CT-1 for improved lubrication and wear resistance.
Designed for high-performance SR20DE and SR20DET engines.

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Product Details

When you're rebuilding or upgrading your SR20DE or SR20DET engine, the bearings are a critical component. These ACL high-performance rod bearings are built to handle more stress than stock, making them a solid choice for performance builds. They are specifically sized at 0.25mm undersize, which is important if you've had your crankshaft ground down during a rebuild to ensure a proper fit and oil clearance. The 17mm width is standard for these applications, and the CT-1 coating adds a layer of protection and improved lubricity.

ACL has been making engine bearings for a long time, and these are well-built for the job. The CT-1 coating is a notable feature that helps reduce friction and wear, especially during the critical break-in period and under demanding conditions. This coating can help maintain oil film integrity, which is essential for preventing bearing damage. If you're looking for reliable bearings for your performance SR20 build, these are a popular option.