What does '.25mm undersize' mean for these rod bearings?

This means the bearings are manufactured to be 0.25mm smaller in diameter than standard size. This is typically used when the engine's crankshaft journals have been machined down (ground) by 0.25mm to remove imperfections or to prepare for an undersize bearing.

Are these bearings suitable for a stock engine?

While these are performance bearings, they can be used in a stock engine if the crankshaft journals have been machined to the .25mm undersize specification. However, they are specifically designed to handle increased stress from performance modifications.

What is the primary benefit of using performance rod bearings?

Performance rod bearings are built with stronger materials and tighter tolerances to withstand higher RPMs, increased cylinder pressures, and greater heat loads that often come with engine modifications.

1971-1974 Ford Pinto Rod Bearings | ACL .25mm Oversized

Name: ACL Ford/Cosworth 2.0L (YB) .25mm Oversized Performance Rod Bearing Set
Brand: ACL
SKU: acl-acl-ford-cosworth-2-0l-yb-25mm-oversized-performance-rod-bearing-set-t14-105718
Price: 89.82 USD
Availability: BackOrder

ACL Ford/Cosworth 2.0L (YB) .25mm Oversized Performance Rod Bearing Set

$89.82

On Backorder

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

Fits 1971-1974 Ford Pinto. ACL .25mm undersize performance rod bearings for your 2.0L (YB) engine.

Key Features

Fits 1971-1974 Ford Pinto and Mercury Capri.
Set includes .25mm undersize performance rod bearings.
Designed for the 2.0L (YB) Cosworth engine.
Well-built by ACL for reliable performance.

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Fits these vehicles

Ford Pinto 1971-1974
Mercury Capri 1971-1974

Product Details

Already running performance upgrades on your Ford Pinto or Mercury Capri? If you've got the engine built for more power, this set of ACL performance rod bearings is the next piece of the puzzle. These bearings are designed to handle the increased stress that comes with a modified 2.0L (YB) Cosworth engine, helping to keep your engine running smoothly under demanding conditions.

ACL has been making engine bearings for a long time, and they know what it takes to build a solid part. This set is .25mm undersize, which is important if you've already had your crankshaft machined to match. Using the correct undersize bearing ensures a proper fit and oil clearance, which is critical for bearing life and engine health. They are well-built to handle the extra load and heat generated by a performance engine.

When you're rebuilding or modifying your engine, getting the bearing clearances right is key. This set from ACL is a popular choice for tuners looking to get the most out of their 2.0L (YB) Cosworth engine. Make sure to check your crankshaft journal size to confirm you need the .25mm undersize bearings before ordering.