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Engines and Components› Connecting Rods and Components

Molnar

H-Beam Connecting Rod Set, 5.976-Inch, 2.167-Inch Big Bore, 21mm Pin

$558.75 $503.25 Save $55.50

SKU: ZH5976MEB4-A

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Description

The Molnar ZH5976MEB4-A is a set of H-beam connecting rods specifically engineered for the Mazda MZR 2.5L engine with a 21mm pin. Constructed from robust 4340 billet material, these rods are heat-treated to enhance tensile strength and shot-peened to increase fatigue life, ensuring durability under demanding conditions. Each rod features a center-to-center length of 5.976 inches, a big end bore of 2.167 inches, and a pin end width of 0.708 inches. The big end width measures 0.859 inches. The connecting rods utilize high-strength 3/8 ARP2000 bolts, custom-made by ARP for Molnar Technologies, and include a wear-resistant bronze bushing for extended wrist pin longevity. These rods are finished in the USA. They are suitable for performance upgrades and custom builds, allowing enthusiasts to enhance their vehicle's engine with confidence. The typical weight for this set of connecting rods is 552 grams.

MIA's Description

The Molnar ZH5976MEB4-A is a set of sport compact H-beam connecting rods. These rods are constructed from 4340 billet material and feature ARP2000 bolts. They have a center-to-center length of 5.976 inches and a big end bore of 2.167 inches. The pin end width is 0.708 inches and the big end width is 0.859 inches.

These connecting rods are designed for the Mazda MZR 2.5L engine with a 21mm pin. They are finished in the USA and come with necessary essentials for installation and clear instructions. The rods are heat-treated for increased tensile strength and shot peened for improved fatigue life. A wear-resistant bronze bushing is included for extended wrist pin durability.

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Specifications

BrandMolnar
Part NumberZH5976MEB4-A
CategoryEngines and Components

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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