Manley Performance Pro Series I-Beam Connecting Rod Set 2015-2021 WRX | Forged 4340 Steel | High-Strength Engine Internals
Overview
The Manley Performance Pro Series I-Beam Connecting Rod Set is engineered specifically for the 2015-2021 Subaru WRX, designed to handle high horsepower builds with precision and reliability. These connecting rods are a critical component in your engine’s rotating assembly, transferring the combustion forces from the pistons to the crankshaft. Ideal for enthusiasts pushing their WRX beyond stock power levels, this set supports builds targeting 1000+ horsepower, making it a solid choice for serious turbocharged applications.
Manley’s Turbo Tuff® I-Beam rods are crafted with meticulous attention to detail, utilizing forged 4340 steel to deliver exceptional strength and durability. The I-beam design balances weight and rigidity, optimizing performance without unnecessary mass. Manufactured with precision CNC processes and fitted with high-quality ARP 2000 rod bolts, these rods exemplify Manley’s commitment to quality and engineering excellence. Their NHRA legal certification on select SKUs further underscores their suitability for competitive motorsports.
For Subaru WRX owners, upgrading to Manley’s Pro Series rods means reinforcing the engine’s bottom end to withstand increased boost and power levels reliably. The precise dimensions and material choices ensure consistent performance and longevity, even under demanding track or street conditions. This connecting rod set is a foundational upgrade for anyone building a high-output WRX engine, providing peace of mind and enhanced durability.
Features & Specifications
This Manley Performance Pro Series I-Beam Connecting Rod Set is engineered for the 2015-2021 Subaru WRX and features a 5.090-inch center-to-center length with forged 4340 steel construction. Designed for high horsepower applications, it delivers superior strength and durability for Subaru enthusiasts seeking reliable engine internals capable of supporting 1000+ HP builds.
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Brand: Manley Performance
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Product: Pro Series I-Beam Connecting Rod Set
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Part Number: 14431-4
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Fitment: 2015-2021 Subaru WRX
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Material: Forged 4340 Steel
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Finish: Natural Forged Steel
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Construction: Precision Forged I-Beam
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Origin: Made in USA
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Center To Center Length: 5.090 in.
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Big End Bore Diameter: 2.087 in.
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Pin Bore Diameter: 0.8671 in. (22mm Pin)
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Rod Bolt Material: ARP 2000
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Approximate Horsepower Rating: 1000+ HP
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Connecting Rod Type: I-Beam
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Connecting Rod Series: Pro Series Turbo Tuff®
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Rod Quantity: Set of 4
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NHRA Legal Certification: Available on select SKUs
Key Benefits
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Performance: Supports high horsepower builds over 1000 HP, ideal for turbocharged WRX engines.
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Durability: Forged 4340 steel construction offers superior strength and fatigue resistance under extreme conditions.
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Fitment: Precision-engineered for 2015-2021 WRX engines ensuring exact OEM dimensions and reliable installation.
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Quality: Manufactured with strict quality control and fitted with ARP 2000 rod bolts for secure fastening.
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Compliance: NHRA legal certification on select SKUs supports competitive racing applications.
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Weight Optimization: I-beam design balances strength and weight for improved engine response and longevity.
What's Included
- 4× Manley Performance Pro Series I-Beam Connecting Rods
- 16× ARP 2000 Rod Bolts (4 per rod)
- Installation instructions
Installation & Compatibility
Installation of the Manley Pro Series I-Beam Connecting Rod Set requires engine disassembly and precise torque application of the ARP 2000 bolts. This is a professional-level upgrade best installed by an experienced engine builder or mechanic familiar with Subaru EJ25 engines. Proper balancing and clearancing are recommended to ensure optimal performance and reliability. No modifications to the engine block are necessary, but verify compatibility with your specific WRX model year and build specifications. Tuning is required to safely maximize the power potential supported by these rods.
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Professional Installation: Recommended
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific 2015-2021 WRX model and engine build
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