ACL 4B8366HX-STD Race Rod Bearing Set STD +0.001" Toyota 3S-GE 3S-GTE Celica MR2

Vehicle Fitment

• 1984-2005 Toyota Celica (T160/T180/T200) - 3S-GE 2.0L DOHC 16v (Gen 1-5, Naturally Aspirated)
• 1986-1989 Toyota Celica GT-FOUR (ST165) - 3S-GTE 2.0L DOHC 16v Turbo (Gen 1)
• 1990-1993 Toyota Celica GT-FOUR / All-Trac (ST185) - 3S-GTE 2.0L DOHC 16v Turbo (Gen 2)
• 1994-1999 Toyota Celica GT-FOUR (ST205) - 3S-GTE 2.0L DOHC 16v Turbo (Gen 3)
• 1990-1999 Toyota MR2 (SW20) - 3S-GE and 3S-GTE variants
• 1994-2002 Toyota Caldina GT-T / GT-Four (ST215W/ST246W) - 3S-GTE 2.0L Turbo (Gen 4/5)
• 1997-2005 Toyota Altezza RS200 (SXE10) - 3S-GE BEAMS 2.0L DOHC (Gen 5)
• Various Toyota Corona, Carina, Camry, RAV4 - 3S-GE naturally aspirated variants by generation

Fitment Notes

• The HX designation indicates extra oil clearance: the bearing wall is approximately 0.013mm thinner per shell compared to the standard 4B8366H-STD set, providing approximately 0.025mm (0.001") of additional running clearance at standard crankshaft journal diameter - without any crankshaft grinding.
• The HX variant is a popular choice for turbocharged 3S-GTE builds and high-revving naturally aspirated 3S-GE applications where a slightly more liberal oil clearance is desired for improved bearing protection under elevated loads and temperatures.
• For standard oil clearance at stock journal diameter, use 4B8366H-STD. For reground crankshafts, use the appropriate oversize H set: 4B8366H-.025 (+0.025mm), 4B8366H-.25 (+0.25mm), or 4B8366H-.50 (+0.50mm).
• Covers all five generations of the naturally aspirated 3S-GE (1984-2005) and all four generations of the turbocharged 3S-GTE (1986-2007) - all share the same crankpin journal dimensions.
• Always confirm actual running clearance with Plastigage or a dial bore gauge after assembly - do not rely solely on bearing size designation.
• Sold as a complete set of 8 bearing shells - sufficient for one full 4-cylinder engine build.

Features

• Tri-metal construction: copper-lead alloy lining bonded over a hardened steel backing, with a high-strength overlay plate - engineered for the high-RPM demands of the naturally aspirated 3S-GE and the sustained boost loads of the turbocharged 3S-GTE.
• HX extra-clearance wall thickness provides approximately 0.025mm (0.001") of additional oil clearance versus the H-STD set, increasing oil film volume between the crankpin and bearing surface for improved lubrication under extreme load - particularly valuable in boosted 3S-GTE builds running elevated boost or sustained track use.
• Hardened steel backing on all rod bearings improves structural support of the bearing lining and maintains crush under high sustained loads and temperatures.
• High-strength overlay plate with reduced thickness provides improved fatigue resistance compared to OEM-spec bearings - a meaningful upgrade for any rebuilt 3S-series engine targeting performance reliability.
• Increased bearing crush and tighter wall tolerances ensure consistent, secure seating in the connecting rod housing bore, reducing the risk of bearing spin.
• Enlarged ID chamfers on bearing edges accommodate the larger fillet radii found on performance and aftermarket 3S-series crankshafts.
• 3/4-groove design optimizes oil supply to the rod journal and maximizes load-carrying surface area across the bearing face.
• Elimination of flash plating on bearing backs improves heat transfer and maximizes grip between the bearing shell and the rod housing bore.
• Increased eccentricity compensates for bore distortion at high RPM and assists in the formation of a stable hydrodynamic oil film under load.

Specifications

• Part Number: 4B8366HX-STD
• Product Line: ACL Race Series
• Application: Connecting Rod Bearings
• Engine Compatibility: Toyota 3S-GE 2.0L DOHC 16v (all 5 generations, 1984-2005, Naturally Aspirated); Toyota 3S-GTE 2.0L DOHC 16v Turbo (Gen 1-4, 1986-2007)
• Crankshaft Size: Standard (STD - Unground)
• Oil Clearance Designation: HX - Extra +0.025mm (+0.001") clearance vs. H-STD
• Shaft (Crankpin) Diameter: 47.985-48.000mm (1.8892-1.8898 in)
• Tunnel (Housing Bore): 51.004-51.024mm (2.0080-2.0088 in)
• Maximum Wall Thickness at Crown: approx. 1.475mm (0.0581 in)
• Maximum Overall Length: 21.3mm (0.839 in)
• Bearing Material: Tri-Metal Copper-Lead Alloy / Hardened Steel Backing
• Quantity: Set of 8 Shells (complete engine set)

Included Components

• 8x Race Series Connecting Rod Bearing Shells - Standard Size, Extra Oil Clearance (HX)

Product Description

The ACL Race Series 4B8366HX-STD connecting rod bearing set is the extra-clearance performance option for Toyota's 3S-GE and 3S-GTE inline-4 engine family - spanning the naturally aspirated 3S-GE across five generations (1984-2005) and the turbocharged 3S-GTE across four generations (1986-2007). Sharing the same standard crankpin journal diameter as the 4B8366H-STD, the HX variant uses a slightly thinner wall (~0.013mm per shell) to deliver approximately 0.025mm (0.001") of additional running oil clearance without any crankshaft modification.

The HX variant is widely favored for 3S-GTE turbo builds - the Celica GT-FOUR, MR2 Turbo, and Caldina GT-T community commonly specifies extra clearance bearings for boosted applications where sustained cylinder pressure and heat demand more from the rod bearing oil film. Equally appropriate for high-revving naturally aspirated 3S-GE builds in the Altezza RS200 and BEAMS-spec Celica. All generations of the 3S-GE and 3S-GTE share identical crankpin journal dimensions, making this set universal across the entire engine family at standard crankshaft size. Always confirm clearances at assembly. Sold as a complete set of 8 shells for one engine.