ZRP Machined Aluminium Crankshaft for Subaru 2.5L EJ25 / EJ257 Stroker 2.7L C-SUB-003UL

The ZRP long stroke crankshaft for Subaru 2.5L EJ25 / EJ257 increases displacement to 2.6L (99.5mm x 83.0mm). Manufactured from aerospace grade solid 4340 steel, no expense has been spared on material quality to ensure the best product possible. This crankshaft, meticulously designed from our extensive experience, offers maximum engine performance. Its production process includes very rigorous inspections to ensure maximum quality and precise tolerances for a perfect fit. The Subaru crankshaft is fully balanced to an accuracy of 1 g·cm² / -0.1 using state-of-the-art Sunnen machinery. A report with the balancing results is included. Please see specific features for your application below.

Product Features & Design

Crankshaft web and counterweights drilled for weight reduction and rotating mass reduction.
Dual Path: direct oiling.
Chamfered oil holes.
Journal radii distributes load stress.

Tapered rod journals for weight reduction.

ZRP Crankshaft Technical Features

Full CNC Machined.

Ionic (plasma) nitriding process for hardening.

Multi-stage heat treatment.

Shot peened for stress relief.

100% Magnefluxing for a flawless surface finish.

Heat treated for superior wear resistance.

Micro polished for extended bearing life.

Ultrasonically & X-ray tested to ensure a reliable end product.