Overview

Tomioka Racing Premium EJ25 Stroker Kit for the 2004-2013 Subaru Forester / 2004-2021 STI / 2005-2012 Legacy / 2006-2014 WRX. It raises bore and stroke from the factory EJ25 specification while using the original EJ block.

Fits These Vehicles

Features & Specs

• Forged 2618 aluminum pistons
• I-beam connecting rods and billet crankshaft
• Race main and connecting rod bearings
• 83 mm stroke, 130.5 mm rod length, 8.5:1 compression ratio
• Bore options 99.50, 99.75 and 100.0 mm (choose from the option selector)

What's Included

• Billet crankshaft
• I-beam connecting rod set
• Forged piston set
• Race main bearing set
• Race connecting rod bearing set

Straight from SubiSpeed

This is an engine builder part for high-power builds, so plan on machine work, a professional assembly and a custom tune. Pair it with head studs and a head gasket matched to the bore you choose, and confirm your engine configuration before ordering.