Darton EJ25 Seal Tight Sleeve | 2004-2014 Subaru WRX STI and 2006-2014 Subaru WRX (300-031-3)

Multiple Subaru Fitments Seal Tight Sleeve by Darton

Subaru blocks are made out of aluminum and can sometimes react adversely to heat, slightly changing clearances with temperature changes. This consequently makes the engine less consistent and less reliable. Inserting a Ductile Iron Dry Sleeve into an aluminum Subaru block reduces the amount of warp, and remains a consistent size and shape through its operating heat range.

Dry Sleeve means that the sleeve does not contain water/coolant passages bored through the sleeves. This solid design provides a more rigid structure to prevent warping and sleeve expansion.

Features

• Bore - 3.890
• O.D. - 4.250
• O.D. 2 - 4.200
• Wall - 0.180
• Length - 4.800
• Flange Thickness - 0.500
• Flange Diameter - 4.600
• Flats - 2.223

Applications

• 2005-2006 Saab 9-2X Aero
• 2004-2006 Subaru Baja Turbo
• 2004-2013 Subaru Forester XT
• 2006-2014 Subaru WRX
• 2004-2014 Subaru WRX STI

What's In The Box?

• 1 - Darton Sleeve

Warranty

• Manufacturer's Warranty