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COBB Tuning Shortblock - ProSeries SUBARU

Brand: COBB Tuning | Category: Engine Blocks

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Fitments

SUBARU
More Information Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
Click For More Info 2004 - 2007 FORESTER XT
XT LIMITED
H4 2.5 T EJ255 GAS
Click For More Info 2002 - 2007 IMPREZA WRX
WRX TR
H4 2.0
2.5
T EJ205
EJ255
GAS
Click For More Info 2004 - 2007 IMPREZA WRX STI
WRX STI LIMITED
H4 2.5 T EJ257 GAS
Click For More Info 2005 - 2007 LEGACY GT H4 2.5 T EJ255 ALL
Click For More Info 2005 - 2007 OUTBACK XT H4 2.5 T EJ255 ALL

Product Description

COBB Tuning Pro Series Short Blocks are SOLD FULLY ASSEMBLED. NO CORE CHARGE REQUIRED!

The term Short Block refers to the cylinder block itself, without cylinder heads, water or oil pumps, or any accessories located outside of the cylinder block.

PRO SERIES STAGE 1
Recommended up to 550-600HP.

Pro Series blocks are built to very exacting standards and are meant for high-end, high power use and the demands of racing.

Please note when ordering we need to know specifically which cylinder head you will be using.

The COBB Tuning Stage 1 Pro Series shortblock consists of a carefully chosen set of components engineered to be used together.

FEATURES

  • EJ25 “STI” Semi-closed Block (2.5L Displacement)
  • Ductile Iron Sleeves
  • Billet Steel (4340) I-beam “Long” Connecting Rods
  • Forged Aluminum “3D Chamber Matched” Pistons (8.5:1 CR, customizable)
  • Heavy-Duty Chromoly Piston Pins
  • Low Friction Piston Rings
  • STI Forged Chromoly Crankshaft (79mm Stroke)
  • Professional Series Rod and Main bearings
  • Computerized Balance of rotating assembly

PRO SERIES STAGE 2
Recommended for over 600HP

Featuring a 2.65L displacement, we utilized custom designed components built to withstand the high levels of power and abuse you demand from it. Precisely engineered components were utilized internally to maintain the optimal geometry when running extended stroke. Our engines have been tested to the extremes in many forms of professional-level motorsports – as well as demanding street drivers – to prove our ideas work as well in real life as they do in theory.

COBB Tuning Short Blocks consist of a carefully chosen set of components engineered to be used together.

FEATURES:

  • EJ25 “STI” Semi-closed Block (2.5L Displacement)
  • Ductile Iron Sleeves
  • Billet Steel (4340) I-beam “Long” Connecting Rods
  • Forged Aluminum “3D Chamber Matched” Pistons (8.5:1 CR, customizable)
  • Heavy-Duty Chromoly Piston Pins
  • Low Friction Piston Rings
  • PRO Series Lightweight Billet Stroker crankshaft (81mm Stroke)
  • Professional Series Rod and Main bearings
  • Computerized Balance of rotating assembly (within 0.01 gram)

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