Skunk2 Alpha Series Subaru EJ25 Connecting Rods

Alpha Series Rods are forged from select 4340 chromoly steel and feature an H-beam design, resulting in the ultimate strength-to-weight ratio. 4340 chromoly is one of the strongest materials available, however, not all 4340 chromoly is the same. As such, Skunk2 relies on extensive material testing and works closely with its foundry to produce high-quality rods at an affordable price. Comprehensive heat-treating, tempering, and shot-peening processes together ensure that each Alpha Series Rod remains consistent and strong. Finally, each rod is magna-fluxed to ensure integrity and that each process has been completed thoroughly and according to Skunk2’s rigid specifications. Skunk2’s engineers spent nearly three years developing and testing its H-beam rod design. The results are one of the strongest beam configurations available, capable of handling more than 900 hp. Engineers made use of FEA (Finite Element Analysis) to determine high-stress points and implemented features to reduce wear and increase strength. Skunk2’s straight design distributes stress across a larger area when compared to tapered rods, providing additional support where necessary. Alpha Series Rods are manufactured from two-piece forgings, resulting in optimal grain orientation along the rod cap for increased strength. By orienting the metal’s grain in the direction of stress along the rod cap, perpendicular to the stress exerted along the beam, strength is significantly increased. Skunk2’s two-piece forgings provide a precision-tight fit between the rod’s cap and its beam without resorting to the brittle materials required by other processes. Alpha Series Rods also feature dual oil passages at their pin ends, providing additional lubrication and cooling, which leads to an even stronger, more durable rod. Unlike other designs, Skunk2’s carefully positioned, offset oil passages help deliver lubrication around the entire wrist pin, during each phase of the engine cycle.

This Part Fits:

Year	Make	Model	Submodel
2004-2006	Subaru	Baja	Turbo
2008	Subaru	Forester	Sports 2.5 XT
2004-2005,2009	Subaru	Forester	XT
2006-2010	Subaru	Forester	XT Limited
2005,2010-2013	Subaru	Forester	XT Premium
2011-2013	Subaru	Forester	XT Touring
2009-2010	Subaru	Impreza	2.5 GT
2006-2014	Subaru	Impreza	WRX
2006-2007,2010-2014	Subaru	Impreza	WRX Limited
2009-2014	Subaru	Impreza	WRX Premium
2006-2007	Subaru	Impreza	WRX TR
2010-2012	Subaru	Legacy	2.5GT
2005-2006	Subaru	Legacy	GT
2005,2007-2009	Subaru	Legacy	GT Limited
2006-2009	Subaru	Legacy	GT spec.B
2005-2006	Subaru	Outback	XT
2005-2009	Subaru	Outback	XT Limited