Billet Crankshaft 79.00mm Stroke EN40B CORUS Steel

The RCM/Arrow 79mm Billet Crankshaft is engineered by Roger Clark Motorsport to deliver superior performance and reliability for Subaru Impreza WRX/STI models with EJ20 and EJ25 engines. Constructed from Arrows proprietary low sulphur CORUS steel (EN40B/722M24), this crankshaft is significantly lighter and stronger than its OEM counterpart. It features a 79.00 mm stroke and is fully machined to exacting standards. Each unit is meticulously balanced to within 2 to 15 grams and undergoes 100% crack detection to ensure the highest level of quality and durability. Comprehensive certification is provided, covering material, heat treatments, balancing, and critical detail inspection reports. Key technical specifications include a pin diameter of 51.99 mm, pin width of 21.50 mm, main diameter of 59.99 mm, and main width measurements of 18.5, 22.0, and 23.0 mm. This RCM132 crankshaft is designed to be compatible with EJ25 and EJ20 engine cases. This billet crankshaft is intended for high-performance applications and is a direct replacement for the OE unit, offering enhanced strength and reduced weight for improved engine response and overall performance. It is listed for fitment in various Subaru models including the 2006-2007 WRX, 2008-2014 WRX, 2004-2007 STi, 2008-2014 STi, and 2015-2021 STi.