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SKU: 4B8171H-.025
ACL Race Series Engine Connecting Rod Bearing Set for Ford 2.3L EcoBoost
Engineered for unrivaled performance, these bearings are the top choice for racers and performance enthusiasts worldwide, delivering unmatched durability, precision, and reliability under the most extreme conditions. Whether you’re tearing up the track in a Mustang, dominating in a Focus RS, or pushing the limits in a Mazda 3 MPS, ACL Race Series bearings are the definitive upgrade for high-RPM, high-load applications. Proven in motorsports from NASCAR to drift racing, these bearings outperform all competitors, making them the best choice for your performance build.
Why ACL
- Motorsport-Proven Performance: Trusted in record-setting race engines across sport compact, NASCAR, IHRA, and NHRA competitions, ACL Race Series bearings are built to withstand the harshest conditions where others fail.
- Advanced Tri-Metal Construction: Featuring a high-strength overlay plate with reduced thickness, these bearings offer superior fatigue resistance, lower friction, and enhanced seizure resistance, ensuring longevity even at extreme RPMs.
- Precision Engineering: Manufactured to exacting tolerances with micron-accurate machining, ACL bearings ensure consistent wall thickness and crush for reliable fitment and optimal clearances, reducing engine noise and wear.
- Enhanced Heat Dissipation: Elimination of flash plating on the bearing backs maximizes heat transfer and grip, keeping temperatures low during intense operation.
- High-RPM Optimization: Increased eccentricity compensates for bore distortion at high speeds, while enlarged ID chamfers accommodate performance crankshafts with larger fillet radii, ensuring a perfect hydrodynamic oil film.
- Unmatched Durability: Hardened steel backs improve bearing retention and support, making these bearings ideal for turbocharged, high-output engines like the Ford 2.3L EcoBoost.
Technical Specifications
- Minimum STD Shaft Size: 2.0465" / 51.980mm
- Maximum STD Shaft Size: 2.0472" / 52.000mm
- Minimum STD Tunnel Size: 2.1662" / 55.021mm
- Maximum STD Tunnel Size: 2.1667" / 55.034mm
- Maximum Wall at Crown: 0.0591" / 1.500mm
- Maximum Overall Length: 0.669" / 17.00mm
Fitment
Ford:
- Mustang (2.3L EcoBoost): 2015–2023
- Focus RS (2.3L EcoBoost): 2016–2018
Other Ford Models with 2.0L/2.3L EcoBoost Engines:
Mazda
- Mazda 3 MPS (2.3L L3-VDT DISI Turbo): 2006–2013
- Mazda 6 MPS (2.3L L3-VDT DISI Turbo): 2005–2008
- CX-7 (2.3L L3-VDT DISI Turbo): 2006–2012
Included
- Rod Bearing Set: Four (4) pairs of ACL Race Series connecting rod bearings, designed for identical halves with no notch for seamless installation.
- Specification: 0.025mm (0.001") undersize for precise fitment with performance crankshafts.
- Packaging: Brand-new, unused, unopened, and undamaged in original ACL packaging (Box Dimensions: 4.4" L x 2.5" W x 1.3" H, Weight: 0.32 lbs).
- Warranty: Eligible for ACL’s warranty, contact customer service for details.
- Fitment Guide: Includes compatibility details for easy installation.
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