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CP Piston Set 99.5mm Bore 8.2:1 CR - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
CP Piston Set 99.5mm Bore 8.2:1 CR - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
CP Piston Set 99.5mm Bore 8.2:1 CR - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
CP Piston Set 99.5mm Bore 8.2:1 CR - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
CP Piston Set 99.5mm Bore 8.2:1 CR - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
CP Piston Set 99.5mm Bore 8.2:1 CR - Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)

CP Piston Set 99.5mm Bore 8.2:1 CR

Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)

Was: $858.90
$755.83
You save:
12%
($103.07)
msrp: $1,018.00

Estimated to ship in 11 days
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Features & Product Details

RallySport Direct proudly carries a great selection of CP Pistons for those of you who need a strong and durable piston in a high-horsepower build. 

 

Here, you are looking at the CP Piston Set. These pistons will come provided with rings and wrist pins and are designed to sustain the perils of high horsepower and high boost builds.


 

FEATURES:

  • 99.5mm bore
  • 8.2:1 Compression ratio
  • Deep valve relief depth accommodates high lift camshaft
  • Made for +1mm valve sizes
  • Custom skirt cam and barrel design
  • Accumulator grooves
  • High strength aluminum forgings
  • High-performance rings
  • Fully CNC machined and balanced to +/- 1 gram
  • Wrist pins included at no additional cost
  • Double pin oilers, force fed oil ring
  • Picklock grooves for easy lock removal
  • Pin fitting included
  • Specifications

    Brand: CP
    Anti-Friction Coating: No
    Bore Size: 99.50mm
    Compression Ratio: 8.2:1
    Head Alteration Required: No
    Machining Required: No
    Material: Forged
    Piston Rings Included: Yes
    QTY: 4
    Wrist Pin Clips: No
    Wrist Pins Included: Yes
    Mfgr. Warranty: No Warranty
    Condition: New Product
    Return Policy:
    Standard

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    6 Reviews
    5 out of 5 Stars
    5 Stars
    (6)
    4 Stars
    (0)
    3 Stars
    (0)
    2 Stars
    (0)
    1 Stars
    (0)
    Customer Photos and Videos
    No user media. You can upload a photo or video of your install by posting a review.
    Forged Piston with other upgrades 6 years ago
    5out of 5stars
    kung fu tiger
    I just finished 500kms breaking in with my new CP forged pistons, upgraded injectors to 1000cc with DW 300C pump and stage 2 racing clutch. I am very satisfied with the results so far and after 1000 kms more i will have it Dyno tested.
      
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    1 of 2 people found the following review helpful
    Great pistons 8 years ago
    5out of 5stars
    geoffrey97817
    Didn't notice any slap when cold. Perfect fit right out of the box.
      
    Was this review helpful?
    0 of 1 people found the following review helpful
    great product 8 years ago
    5out of 5stars
    Subiesuperlover
    Piston slap when cold
      
    Was this review helpful?
    0 of 1 people found the following review helpful
    great product 8 years ago
    5out of 5stars
    Subiesuperlover
    Piston slap when cold
      
    Was this review helpful?
    2 of 2 people found the following review helpful
    Amazing! 9 years ago
    5out of 5stars
    Evans609
    Perfect fit with no issues so far. I have almost 30,000km put on them and havent had any trouble. And as always great service from RSD!
      
    Was this review helpful?

    QUESTIONS & ANSWERS

    • Q: CP Piston Set  Alex Mendoza2 years ago

      would I have to get my car tuned if I use these pistons
      • 0 of 0 people found the following answer helpful

        A:  We would highly recommend tuning after something as in depth as piston replacement.

        Lane H. @ RallySport Direct 2 years ago  
          
        Was this answer helpful?
    • Q: Compression ratio for EJ255  Aman12762 years ago

      Would the CR still be 8.2 or would it up to 8.4 because of the different heads in the ej25D and 255?
      • 0 of 0 people found the following answer helpful

        A:  If you are using the EJ255 heads, the effective compression ratio will rise, so you would want to take that into consideration during the build. Most people will run a slightly thicker headgasket to make up for the small bump in the CR. Thanks!

        Rick C. @ RallySport Direct 2 years ago  
          
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    • Q: compression ratio  John S.3 years ago

      I am looking at running these pistons on a 06 wrx with the d25 heads, what would the CR be on those heads?
    • Q: valve size  John S.4 years ago

      these pistons say that they are made for +1mm size valves, is it necessary to run the oversized valves with these pistons or can you keep your stock valves in?

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