ACL Race Series Reinforced Rod Bearings - Fiat, Alfa Romeo, Lancia 1.8L, 1.9L, 2.0L

Engineering Bulletin

ACL provides an official guide for clearance control and optimization, and guidelines for bearing size selection : download it here.

ACL Race Series Reinforced Rod Bearings

Designed to withstand high RPM, temperatures and load, these ACL Race Series bearings are manufactured from 3 layers of hardened steel, copper and nickel. This "trimetal" composition substantially lowers friction, and thus reduces the operating temperatures while providing superior lubrication.

To help engine builders optimise clearances for their specific applications, ACL provides a range of different bearing sizes for standard crankshaft journal sizes:

• H-STD: Bearing thickness is precision finished to provide a nominal clearance based on OEM specifications. Suitable for all applications using crankshafts finished to OEM specifications.
• HX-STD: Providing an extra .001" (0.025mm) of clearance over the H-STD size bearings. Suitable for high to extreme power applications where additional clearance is beneficial to part reliability.
• H-001 / H-.025: Providing a reduction of .001" (0.025mm) of clearance over the H-STD size bearings. Suitable for adjusting clearance to compensate for surface reconditioning (polishing) of crankshaft journals or the use of low viscosity lubricants.

Please note: there are also HD (with location dowel holes) and HXD (with location dowel holes and 0.025mm (0.001") extra clearance) part numbers, reserved for some connecting rod bearing applications only.

Application List & Engine Codes

• Alfa Romeo/All/DOHC/AR32201
• Alfa Romeo/All/DOHC/AR32205
• Alfa Romeo/All/DOHC/AR32301
• Alfa Romeo/All/DOHC/AR32303
• Alfa Romeo/All/DOHC/AR32310
• Alfa Romeo/All/SOHC/AR33601
• Alfa Romeo/All/DOHC/AR34103
• Alfa Romeo/All/DOHC/AR36301
• Alfa Romeo/All/DOHC/AR38401
• Alfa Romeo/All/DOHC/AR67106
• Alfa Romeo/All/DOHC/AR67199
• Alfa Romeo/All/DOHC/AR67203
• Alfa Romeo/All/DOHC/AR67204
• Alfa Romeo/All/DOHC/AR67299
• Alfa Romeo/All/SOHC/AR67501
• Alfa Romeo/All/SOHC/AR67502
• Lancia/All/SOHC/160 D1.000
• Lancia/All/All/175 A4.000
• Lancia/All/DOHC/182 A2.000
• Lancia/All/DOHC/183 A1.000
• Lancia/All/SOHC/831 D.000
• Lancia/All/SOHC/831 D1.000
• Lancia/All/All/831 D5.000
• Lancia/All/All/831 E5.000
• Lancia/All/All/831 E5.046
• Lancia/All/All/834 B2.000
• Lancia/All/All/834 B2.246
• Lancia/All/All/834 C1.000
• Lancia/All/All/834 C1.246
• Lancia/All/All/834 F1.000
• Lancia/All/All/834 F2.000
• Lancia/All/SOHC/835 A4.000
• Lancia/All/SOHC/835 A4.046
• Lancia/All/All/835 A5.000
• Lancia/All/All/835 A8.046
• Lancia/All/All/836 A2.000
• Lancia/All/All/836 A3.000
• Lancia/All/All/838 A4.000
• Lancia/All/DOHC/839 A4.000
• Lancia/All/DOHC/839 A7.000
• Lancia/All/DOHC/839 A9.000
• Fiat/All/SOHC/146 D7.000
• Fiat/All/SOHC/149 B5.046
• Fiat/All/SOHC/154 B.000
• Fiat/All/All/154 C3.000
• Fiat/All/All/154 C3.046
• Fiat/All/SOHC/154 C6.000
• Fiat/All/SOHC/154 D1.000
• Fiat/All/DOHC/154 E1.000
• Fiat/All/DOHC/160 A5.000
• Fiat/All/SOHC/160 A6.000
• Fiat/All/SOHC/160 A6.046
• Fiat/All/DOHC/160 A8.046
• Fiat/All/SOHC/160 B6.046
• Fiat/All/DOHC/175 A1.000
• Fiat/All/SOHC/176 A3.000
• Fiat/All/SOHC/176 A5.000
• Fiat/All/SOHC/176 B7.000
• Fiat/All/SOHC/178 C9.000
• Fiat/All/DOHC/182 A2.000
• Fiat/All/SOHC/182 A7.000
• Fiat/All/SOHC/182 A8.000
• Fiat/All/DOHC/183 A1.000
• Fiat/All/SOHC/188 A3.000
• Fiat/All/DOHC/188 A6.000
• Fiat/All/DOHC/192 A4.000
• Fiat/All/SOHC/223 A6.000
• Fiat/All/SOHC/230 A2.000
• Fiat/All/SOHC/230 A3.000
• Fiat/All/SOHC/230 A4.000
• Fiat/All/SOHC/280 A1.000
• Fiat/All/DOHC/836 A3.000
• Lancia/Delta/16v/HF Integrale
• Lancia/Delta/8v/HF Integrale