Manley 14078-6 H-Beam Connecting Rod Set 5.709" for BMW N54/N55

Vehicle Fitment

• 2006-2016 BMW 1/3/5/7 Series & Z4 with N54B30 / N55B30 engines (turbocharged)

Features

• Precision-forged 4340 alloy H-beam connecting rods engineered for performance builds
• Center-to-center length: 5.709" - matched to BMW N54/N55 engine architecture
• Finished bore and big-end dimensions designed for OEM journal size compliance
• Shot-peened, stress-relieved and magnaflux-inspected for durability under high RPM and boost
• Available with ARP 8740 or ARP 2000 bolts for high horsepower reliability
• Individual rods weight-matched to tight tolerances for balanced rotating assemblies
• Compatible with forced induction, high rev, and high load motorsport setups
• Direct-fit replacement when OEM rods are removed and rotating assembly is balanced

Specifications

• Part Number: 14078-6
• Rod Set: 6 rods (inline six configuration)
• Rod Type: H-Beam; Material: 4340 forged alloy
• Center-to-Center Length: 5.709"
• Compatible Engines: N54B30 / N55B30 (BMW turbocharged straight-six)
• Designed for high-performance/manual builds - not standard certified part

Included Components

• 1x Manley 14078-6 H-Beam Connecting Rod Set (6 rods)

Product Description

The Manley 14078-6 H-Beam Connecting Rod Set is a high-performance upgrade for BMW N54 and N55 turbocharged straight-six engines, built to withstand elevated RPM, high boost and demanding motorsport conditions. Featuring 4340 alloy forging, precision machining, and inspection processes, these rods deliver reliability and strength when the stock components reach their limits.

With a length of 5.709" and rod geometry matched to the engine's architecture, installation requires cylinder head removal, correct torque specification (especially when using ARP bolts), and full rotating assembly balancing. This set is ideal for engine builders, enthusiasts or tuning shops aiming for high output goals.

Please verify engine configuration, bore/stroke, rod journal size and clearances before ordering. These rods are for medium-to-high horsepower builds and may require additional modifications (such as upgraded bearings, balancing, clearancing) to achieve optimal results.