Manley H-Tuff Beam Connecting Rod Set 5.216in Center to Center WRX 02-14 / STI 04-21 | 15036-4

Product Fitment:

2002-2014 Subaru WRX

2004-2021 Subaru STI

When you're assembling a high-output Subaru EJ20 or EJ25 engine, the connecting rods become one of the most critical components. The Manley Performance H-Tuff Beam Connecting Rod Set, part number 15036-4, is engineered to meet the rigorous demands of boosted or high-revving applications.

Forged from 4340 chromoly steel and finished to exacting tolerances, each rod is individually magnafluxed, shot-peened, stress-relieved, and weight matched to within ±1.5 grams. These rods measure 5.216″ in center-to-center length and are designed with stock big-end journal (2.165″) and wrist-pin size (0.9055″ / 23 mm) for direct compatibility with Subaru EJ engines.

Key Features & Specifications:

• Material: Forged 4340 steel, shot-peened, stress-relieved, magnafluxed for maximum durability.

• Center-to-center length: 5.216″ - engineered for Subaru EJ20/EJ25 platform.

• Big-end journal diameter: 2.165″; Wrist-pin diameter: 23 mm (0.9055″) - maintains factory dimensions for ease of installation.

• Rod weight: Approximately 580 grams per rod, weight-matched set.

• Compatible with ARP 2000 (or optional stronger) rod bolts for best high-power capability.

• Built to support high horsepower levels when paired with proper supporting hardware.

Why Choose This Rod Set?
If your Subaru + turbo build is heading into serious territory - elevated boost, high RPM, heavy duty duty cycle - stock rods can become a limiting factor. These Manley H-Tuff beams give you the strength, precision fitmentt, and quality engineering needed to ensure your internals keep up with your horsepower ambitions. Whether you’re doing a high-boost street car or an aggressive track car, these rods deliver the foundation you need.

Fitment & Installation Notes:

• Because these retain stock journal dimensions, installation is simplified: existing crank and bearings can often be reused (pending inspection), allowing for efficient build cycles.

• After installation, ensure correct bolt stretch or torque, check rod bearing clearances, measure end-play, and re-balance rotating assembly if required.