Supertech BMW S54 Connecting Rod Forged 4340 H-Beam ARP2000 Bolt 3/8in C-C Length 139mm - Set of 6 - CR-BMS54-H139-6

Supertech Forged Connecting Rods

Built to Endure. Designed to Perform.

Supertech connecting rods are engineered for the demands of modern performance engines. Manufactured from premium 4340 forged steel alloy , each rod is optimized using CAD and Finite Element Analysis (FEA) to achieve superior balance, fatigue resistance, and strength-to-weight ratio. Whether you’re building a high-boost turbo engine or a naturally aspirated race motor, Supertech rods deliver reliability at every RPM.

Precision Manufacturing & Engineering

• Forged 4340 Alloy Steel – heat-treated and shot-peened for maximum strength and fatigue life.
• H-Beam and I-Beam Designs – optimized for specific power levels and engine characteristics.
• In-House CAD & FEA Design – ensures ideal geometry, stress distribution, and consistent performance.
• Precision CNC Machining – guarantees dimensional accuracy and perfect bearing alignment.
• Rated up to 250 HP per Cylinder – depending on ARP fastener selection.

H-Beam Connecting Rods

Supertech’s H-Beam Connecting Rods combine low weight and high strength for exceptional high-RPM stability. Each rod set is balanced to tight tolerances for smooth performance under extreme boost or compression loads.

• Made from 4340 forged steel with heat treatment and shot peening.
• Comes standard with ARP 2000 bolts (220,000 psi clamp load).
• Optional ARP 625+ bolts rated up to 280,000 psi for extreme power builds.
• Typical weights: 520–550g per rod, depending on application.
• Ideal for turbocharged, supercharged, or endurance race engines.

I-Beam Connecting Rods

The I-Beam series offers additional rigidity and stiffness for high-compression or boosted setups where maximum structural integrity is essential. The robust beam profile minimizes flex under load while maintaining precise crank-to-piston alignment.

• Forged from 4340 steel with tapered beams for weight reduction.
• Available with ARP 2000 or ARP 625+ fasteners.
• Machined for high flow and oiling efficiency in endurance or track conditions.
• Balanced in sets to ±1g tolerance .

Popular Applications

Supertech connecting rods are available for popular engines including Honda K-Series , Toyota B58 / 4U-GSE , Subaru FA20 , Nissan SR , BMW B48 / 54 , and VW/ Audi 1.8T / EA113 .

Designed for OEM fitment with race-grade performance, each kit includes matched rods, precision hardware, and installation-ready specifications.

Complete Your Build

Combine Supertech rods with Forged Pistons , MLS Head Gaskets , and High Performance Valve Spring Kits for a complete, balanced engine assembly.