Darton Iron Dry Sleeves - Subaru EJ25 Models (inc. 2004-2021 STI)

HIGHLIGHTS: Designed to highly reinforce the cylinder walls in the EJ25 Ideal for those building a big boost and big horsepower engine   Darton Iron Dry Sleeves SPECS: BORE: 3.890 OD: 4.250 OD2: 4.200 WALL: 0.180 LENGTH: 4.800 FLANGE THICKNESS: 0.500 FLANGE DIAMETER: 4.600 Sold as a complete set of 4 sleeves Come as a 99.5mm bore and can be bored out to 102mm   FOR THOSE OF YOU WHO NEED TO ADD MORE STRENGTH TO THAT EJ25 The Darton Iron Dry Sleeves have been designed to greatly reinforce your cylinder walls especially if you are building your engine to sustain more boost and power levels that would otherwise surpass the limits of the factory EJ25. These sleeves feature the strongest in iron construction and will provide your pistons with optimal oil and compression control, along with superior cylinder sealing.