ACL Race rod bearings for Porsche M28 / M44

ACL Race tri-metal rod bearings combine design, metallurgy and engineering for high-performance engines operating at higher RPM conditions.

The set features a high-strength overlay plate with reduced thickness, along with hardened steel backs for improved support of the bearing lining and bearing retention in the housing.

• High-strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings
• Increased crush for improved bearing retention in the housing
• Elimination of flash plating on the back for improved heat transfer and increased grip in the housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in forming hydrodynamic oil films

Suitable for: Porsche 924 I, Porsche 928 I, Porsche 944 I.

Engines: M28, M44 (M44.07, M44.08, M44.09, M44.10, M28.03, M28.04, M28.13, M28.14, M28.17, M28.18, M28.01, M28.02, M28.09, M28.10, M28.20, M28.11, M28.12, M28.21, M28.22, M28.47, M28.44, M28.43, M28.45, M28.46 …). Please check your vehicle’s engine code (registration document or VIN) before ordering; if in doubt, contact us and we will check for you.

Sizes

STD is the standard size for an unground crankshaft. Undersizes (−0.25 mm, −0.50 mm …) are for a reground crank, and “+0.025 mm clearance” (X) is for highly stressed engines. Your machine shop chooses the size after measuring.