IAG 550 2.5L Subaru Short Block (02-14 WRX, 04-21 STI, 05-09 Legacy GT, 04-13 Forester XT)

Designed for modified EJ25 Subarus, the IAG 550 Short Block is a sturdy upgrade that is capable of handling higher cylinder pressures created by increased boost levels. The OEM Subaru connecting rods and pistons (yes, even the STI RA) aren’t strong enough to take on the additional engine load of a larger turbocharger or an increase in boost pressure, which can quickly lead to costly engine failure. Built for boost, IAG’s 550 Short Block solves this problem by incorporating the use of high performance internal components that can stand up to extra load on the motor, ensuring longevity and reliability in high-performance scenarios.