ACL Bearings K-Series Connecting Rod Bearing - Standard - Coated - Nissan 4-Cylinder 77001-X24 This is the medium size

This is the medium size version with a 20 degree angle

Accepts many common 5 1/8 OEM or aftermarket air cleaner assemblies

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They are ideal for daily drivers and for budget builds

ACL Bearings K-Series Connecting Rod Bearing - Standard - Coated - Nissan 4-Cylinder 77001-X24 This is the medium sizeProduct Description: Connecting Rod Bearing K Series Standard Coated Nissan 4 Cylinder High performance driving demands that you use the best parts. So rely on ACL's Race Series Products to perform to the exacting race standards you expect. They provide the dependability it takes to hold up under higher RPM conditions. The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance parts.