MA STAGE 1 SHORT BLOCK
 

• OEM Subaru Pistons

• OEM Case Halves at 99.5mm (Stock Bore)

• EJ257 Sti Connecting Rods

• Induction Heated 2012+ STI Crankshaft

• OEM Rod Bearings

• OEM Main Bearings

• OEM Main Case Bolts

• MAR Blueprint Sheet