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.

Fitment

• 2004–2005 Subaru Forester XT
• 2004–2006 Subaru Baja Turbo
• 2005 Subaru Forester XT Premium
• 2005 Subaru Legacy GT Limited
• 2005–2006 Subaru Legacy GT
• 2005–2006 Subaru Outback XT
• 2005–2009 Subaru Outback XT Limited
• 2006–2007 Subaru Impreza WRX Limited
• 2006–2007 Subaru Impreza WRX TR
• 2006–2009 Subaru Legacy GT spec.B
• 2006–2010 Subaru Forester XT Limited
• 2006–2014 Subaru Impreza WRX
• 2007–2009 Subaru Legacy GT Limited
• 2008 Subaru Forester Sports 2.5 XT
• 2009 Subaru Forester XT
• 2009–2010 Subaru Impreza 2.5 GT
• 2009–2014 Subaru Impreza WRX Premium
• 2010–2012 Subaru Legacy 2.5GT
• 2010–2013 Subaru Forester XT Premium
• 2010–2014 Subaru Impreza WRX Limited
• 2011–2013 Subaru Forester XT Touring

Specifications

Manufacturer part number

306-12-1000

UPC

873265006786

Shipping weight & size

5.00 lb, 9.8 × 4.3 × 4.2 in

Notices

• WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
• Special order item — ships direct from the manufacturer; extended lead times may apply.