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05-09 Legacy GT CP Forged Pistons & Rings

CP Legacy GT forged pistons feature superb ring seal, higher vacuum, lower blow-by, greater durability and increased horsepower and torque through the power band. Better yet, peak horsepower is retained through the life of the piston rings. This is achieved by lightweight forgings and CP's exclusive machining techniques and processes. CP's commitment to racing is reflected in every piston they produce.

CP is dedicated to superior engineering, utilizing the latest forging techniques and CNC machinery and backing it up with rigorous quality control makes for a top-notch product every time that emphasizes performance and reliability. CP has some of the highest quality control standards in the industry. CP is a division of Pankl Racing Systems, a high-technology racing group supplying engine and suspension components to numerous Formula One, F3000, IRL, CART, World Rally Racing teams and to such elite companies as Ferrari and Porsche. You will not find a finer piston for your EJ25.


  • Piston Features:
  • High-strength aluminium forgings
  • Super lightweight design
  • Fully CNC machined and balanced to +/- 1 gram
  • Include wrist pins (DOES NOT INCLUDE WRIST PIN LOCKS, OEM REQUIRED)
  • Accumulator groove included
  • Double pin oilers, force fed from oil ring
Full Piston and Ring Sets


  • Notes:
  • CP Pistons do not include pin retaining locks; they require OEM pin locks.
  • CP Pistons are sold in sets of four (4) and include piston rings
  • FITMENT:
  • Subaru Legacy GT 2005-2009
Description Part # MSRP Price Inventory  
EJ255 & 257 2.5L Standard Size: 99.5mm Bore / 8.2 Compression. SC7420 $1,128.00 $592.00 1 available
EJ255 & 257 2.5L .25mm Oversize: 99.75mm Bore / 8.2 Compression. SC7422 $1,128.00 $592.00 Usually ships next day
EJ255 & 257 2.5L .5mm Oversize: 100mm Bore / 8.2 Compression. SC7421 $1,128.00 $592.00 Usually ships next day
Replacement Piston Rings


  • Note:
  • CP Piston Rings are sold in sets of four (4) only.
  • FITMENT:
  • Subaru Legacy GT 2005-2009
Description Part # MSRP Price Inventory  
EJ257/EJ255 99.5mm Piston Rings RS1658-3917-0 $184.00 $96.00 Usually ships next day
EJ257/EJ255 99.75mm Piston Rings RS1658-3927-0 $184.00 $96.00 3 available
EJ257/EJ255 100mm Piston Rings RS1658-3937-0 $184.00 $96.00 3 available
Mon-Thur 8:30am-10pm & Fri 8:30am-8pm
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101B Domorah Dr., Montgomeryville, PA 18936
Tel: 215-643-5750  Fax: 215-643-5760
Hours:
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Fri 8:30am-8pm

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All Rights Reserved.

101B Domorah Dr.
Montgomeryville, PA
18936

Tel: 215-643-5750
Fax: 215-643-5760