Forged H-Beam Connecting Rods – BMW N55

Forged H-beam connecting rods for the BMW N55, built for serious power and high boost. Precision-forged from 4340 chrome moly steel and designed to accept genuine ARP 2000 bolts, they handle the loads that limit factory rods on big-power street, track and drag builds. ARP 2000 bolts included.

Specifications

What it does

• Handles big power, with 4340 chrome moly and an H-beam profile that resist bending and twisting at high RPM and cylinder pressure, rated to 800–1000+ hp.
• Lasts under load, heat-treated and shot-peened to resist fatigue even under detonation or knock.
• Spins true, with CNC-honed, fully balanced big ends that keep tight clearances and oil-film stability at high engine speeds.
• Revs quicker, with a lighter H-beam profile that cuts reciprocating mass for sharper throttle response.

Build quality

Precision-forged from 4340 aircraft-grade chrome moly, shot-peened and heat-treated, with bronze small-end bushings and deep locking grooves for ARP bolt stability. Pair with RPM Tuning forged 4032 pistons, upgraded bearings and MLS head gaskets for a complete forged bottom end.

Compatibility

Fits BMW N55 engines across E- and F-series platforms: 135i / 335i / 435i, M235i / M2 (non-Competition), X3 35i / X4 35i, and 640i / 740i N55 variants.