Piston Subaru EJ257 WRX STI 4 Cyl Bore (in) 3.957 Bore (mm) 100.5 Size 1.0mm Stroke 79 (SET OF 4 )

Carrillo connecting rods are well known within pro racing and street performance circles for good reason; they produce a premium product that winning racers around the world depend on. Quality and pride go hand-in-hand at Carrillo Industries. Manufacturing a Carrillo rod is much more than cutting a forging, meeting production goals, and shipping deadlines. Every Carrillo rod is made with the goal of winning in mind and the Carrillo rods are a proven performer in both street and racing B58 engines. Carillo’s fasteners and “Carrilloy” rods have proven popular with all racers who want the best. - Special Chrome-Moly based alloy Forged Rods - Lightweight Design for low mass Vs. Stock - Strong and proven in racing - Excellent quality control - Tight tolerances and balancing - Includes High-Quality Non-stretch WMC Rod Bolts, CARR optional Tech Notes: WMC Bolts are the standard hardware included and are an excellent fastener. For extreme output applications and all-out racing, the CARR bolt option holds maximum RPMs and HP levels.