ACL 4B1609H-STD Race Rod Bearing Set Standard Audi VW 1.8T 2.0 FSI/TFSI EA113

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Product Specification:

SKU:ACL4B1609H-STD

MPN: 4B1609H-STD

UPC: 9315726434451

Weight: 0.31 lb

Inventory: 4

Type: Bearings

Vehicle Fitment

2000-2006 Audi A3 (8L), A4 (B6/B7), A6 (C5/C6), TT (8N/8J) - 1.8L (1781cc, Turbo) and 2.0L (1984cc FSI/TFSI) Inline-4
2000-2008 Volkswagen Golf (Mk4/Mk5), Jetta, Passat, Eos, Polo - 1.8L (1781cc, Turbo) and 2.0L (1984cc FSI/TFSI) Inline-4
Seat Leon Cupra, Ibiza Cupra, and Skoda Octavia RS - 1.8T and 2.0 FSI/TFSI EA113 Gen 1 (no notch) engine codes

Fitment Notes

This bearing set is for connecting rods WITHOUT a locating notch - the EA113 Gen 1 engine family from approximately 2000 onward. Earlier Audi/VW engines (1983-2001) use connecting rods WITH a notch (tang) and require the 4B1606H-STD instead. Verify your connecting rod type before ordering.
Applicable engine codes include (non-exhaustive): AMB, ARX, ARY, AUM, AUQ, AWT, AVJ, BEX, BFB, AXW, AXX, BGB, BLR, BLX, BLY, BMB, BPG, BPY, BUL, BWA, BWE, ALT, AWA, and related 1.8T and 2.0 FSI/TFSI EA113 no-notch codes across VW, Audi, Seat, and Skoda applications.
Standard (STD) crankshaft rod journal diameter - for use with stock or unworn crankpins at factory diameter only. For reground crankshafts, use 4B1609H-.025 (+0.025mm) or 4B1609H-.25 (+0.25mm) as appropriate.
An HX extra-clearance variant (4B1609HX-STD) is also available for builders targeting approximately 0.025mm (0.001") additional running clearance at standard journal diameter.
Always measure crankshaft rod journal diameter with a micrometer before selecting bearing size. Confirm actual clearance with Plastigage or a dial bore gauge after assembly.
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-boost, high-RPM demands of performance and competition-built EA113 engines including the 2.0 TFSI.
Hardened steel backing on all rod bearings improves structural support of the bearing lining and maintains crush under high sustained loads - especially important in the 2.0 TFSI's aluminum block at elevated boost pressures.
High-strength overlay plate with reduced thickness provides improved fatigue resistance compared to OEM-spec bearings - the 2.0 TFSI EA113 is notorious for rod bearing failures at power levels above stock, making this a critical upgrade.
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 EA113 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: 4B1609H-STD
Product Line: ACL Race Series
Application: Connecting Rod Bearings (No Notch)
Engine Family: Audi/VW/Seat/Skoda EA113 Gen 1 - 1.8L (Turbo), 2.0L FSI/TFSI Inline-4 (2000 onward)
Crankshaft Size: Standard (STD - Unground)
Shaft (Crankpin) Diameter: 47.758-47.778mm (1.8802-1.8810 in)
Tunnel (Housing Bore): 50.600-50.619mm (1.9921-1.9929 in)
Maximum Wall Thickness at Crown: 1.405mm (0.0553 in)
Maximum Overall Length: 19.00mm (0.748 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, No Notch

Product Description

The ACL Race Series 4B1609H-STD connecting rod bearing set is the standard-size performance replacement for the Audi/VW EA113 Gen 1 inline-4 family from 2000 onward - covering the 1.8T 20v and 2.0 FSI/TFSI engines that power the Golf GTI Mk5, Golf R32, Audi A3, A4, TT, and a wide range of Seat and Skoda performance models. This set is designed for connecting rods without a locating notch, which replaced the notched rod design on EA113 engines from approximately 2000 - a critical distinction from the earlier 4B1606H series. Using the wrong notch type will result in improper seating and bearing failure.

The 2.0 TFSI EA113 in particular has a well-documented sensitivity to rod bearing failures under extended high-load or high-RPM operation, making ACL Race Series bearings a widely recommended upgrade over OEM shells for any rebuilt or performance-modified engine. Built on ACL's proven tri-metal platform, these bearings deliver superior fatigue resistance and oil film stability. Sold as a complete set of 8 shells for one engine.