ACL Race Series main bearings are tri-metal engine bearings for high-performance applications and higher RPM conditions. Their design supports bearing retention, heat transfer and the formation of hydrodynamic oil films.
The set includes ACL Race Series main bearings. Increased eccentricity helps compensate for bore distortion at high RPM, while the 3/4 groove optimizes bearing load-carrying surface area and oil flow to the conrod bearings.
- High-strength overlay plate with reduced thickness for improved fatigue properties
- Increased crush for improved bearing retention in the housing
- Elimination of flash plating on the back for improved heat transfer and grip in the housing
- Increased eccentricity to compensate for bore distortion and assist in forming hydrodynamic oil films
- Tight, consistent wall tolerances to help maintain consistent clearances
Suitable for: Ford Mustang V (S197).
Engines: Boss 5.4, Windsor, Modular 5.4 (5.4L, W, 5.4LSUPERCHARGED). 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.
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