Manley Subaru WRX EJ205/STi EJ257 H Tuff Connecting Rod Set

Performance connecting rods are a foundational upgrade for any engine build that will push beyond factory power limits. OEM connecting rods are designed for stock power levels and cast iron construction that may not handle the combination of high RPM, forced induction, and increased cylinder pressure present in a serious performance build. H-beam and I-beam forged steel rods provide the tensile strength and fatigue resistance needed to survive those conditions reliably.Popular UpgradesH-beam connecting rods forged from 4340 chromoly steel are the most popular choice for turbo and supercharged street builds targeting 500 to 1,000 horsepower. I-beam rods are preferred in applications where compressive loads exceed tensile loads, such as naturally aspirated high-RPM engines and certain diesel applications. Lightweight titanium rods are used in maximum-effort race engines where rotating mass reduction at extreme RPM is the priority.What is the difference between H-beam and I-beam connec...

Connecting rods and push rods are critical internal engine components that transmit force within the combustion cycle. Connecting rods link the piston to the crankshaft, while push rods in overhead-valve engines transfer cam lobe motion upward to the rocker arms and valves. Upgrading both types with forged steel or chromoly alloy components increases durability and allows an engine to handle sustained high-RPM or high-boost operation.Popular UpgradesForged 4340 chromoly H-beam connecting rods are the standard upgrade for any performance engine build targeting more than 400 horsepower, replacing the cast or powdered-metal OEM rods that cannot survive the fatigue cycles of performance use. Performance push rods in hardened chromoly with specific wall thickness and length specifications are essential for LS and small-block Chevy builds where custom camshafts alter valve train geometry. Matched sets in the correct length and diameter simplify assembly and ensure consistent valve train g...

Four-cylinder connecting rods are engineered to the tight dimensions required by high-revving import engines found in the Honda, Subaru, Mitsubishi, Toyota, and Nissan performance platforms. These smaller-displacement engines often see higher specific power output than V8s, placing significant fatigue demands on OEM connecting rods during forced induction or high-compression builds.Popular UpgradesH-beam 4340 chromoly connecting rods for Honda B and K-series, Subaru EJ and FA engines, Mitsubishi 4G63 and 4B11, Toyota 2JZ, and Nissan SR20 are the most popular four-cylinder rod upgrades. These platforms are frequently turbocharged to high power levels that quickly exceed the safe limits of OEM powdered-metal connecting rods. I-beam titanium rods are available for maximum-effort builds targeting the absolute limit of the engine package.How do I choose the right rod for my four-cylinder turbo build?Match the rod's rated power capacity to your build target, not your current power level. ...

This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...

Founded in 1966 by Hank Manley, Manley Performance Products has become one of the most respected names in high-performance engine components. Originally launched as Manley Speed Equipment, the company quickly earned a reputation for precision manufacturing, durability, and race-proven performance. From grassroots beginnings in New Jersey to global recognition in professional motorsports, Manley Performance continues to set the standard in high-performance automotive parts. Manley Performance Engine Parts Manley is known for manufacturing premium internal engine components designed for street, strip, and professional racing applications. Their product line includes: Manley stainless steel valves Manley forged pistons Manley connecting rods (H-Beam, I-Beam, Turbo Tuff, Pro Series) Manley camshafts Manley crankshafts Manley valvetrain components Valve springs, retainers, and hardware Every Manley component is engineered with strict quality control and race-driven innov...