RalliSpec EJ25 Short Block S4 (1150bhp) - Race Spec Pro Air Temp Dampening the transfer of valvetrain

Dampening the transfer of valvetrain shock reduces stress and increases the life of components

Impreza EJ253 MY05-06

Use only an accurate torque wrench of known calibration to ensure best results

Rod Length Center-to-Center = 129

RalliSpec EJ25 Short Block S4 (1150bhp) - Race Spec Pro Air Temp Dampening the transfer of valvetrainRELY ON RALLISPEC'S 25 YEARS OF SUBARU ENGINE BUILDING EXPERIENCE For those of you ready to really turn up the heat, we offer our Race Spec series of closed deck short blocks. These short blocks feature 14mm head stud machining and are optionally machined to accept Fire Lock head gaskets for serious combustion pressure sealing capabilities. The Race Spec Pro utilizes our new IRP pistons, the optimal 2618 piston to provide both incredible power