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Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1 (Part Number: )
Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1 (Part Number: )
Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1 (Part Number: )
Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1 (Part Number: )
Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1 (Part Number: )
Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1 (Part Number: )
Cosworth Forged Pistons w/Pins, Clips, and Rings 99.75mm 9.2:1
Subaru EJ25 Models (inc. 2004+ STI / 2006-2014 WRX)

Features & Product Details

When it's time to tear down the motor, you need to rebuild the block with essential components that can withstand high levels of horsepower, boost, and high-performance driving. This is the Cosworth Piston Set that features 99.75 Bore 9.2:1 Compression Ratio Pistons that include the pins, rings, and the clips to make ready for re-assembly of the block. Cosworth Pistons have been fabricated from high-grade metals that have endured an arduous forged heat treating process to promote better strength and durability and to sustain the perils of high-performance driving. 

This is a complete set ready to install upon re-assembly. 

Specifications

Brand: Cosworth
Anti-Friction Coating: Yes
Bore Size: 99.75mm
Compression Ratio: 9.2:1
Head Alteration Required: No
Machining Required: Yes
Material: Forged
Piston Rings Included: Yes
QTY: 4
Wrist Pin Clips: Yes
Wrist Pins Included: Yes
Mfgr. Warranty: No Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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QUESTIONS & ANSWERS

  • Q: Required Machining  Leoneidous1 year ago

    Hello RallySport! It says that machining is required for these pistons - does that mean boring and honing of the cylinders, or is it referring to something else? Thank you!
    • 0 of 0 people found the following answer helpful

      A:  You will need to actually bore your block out to 99.75. Stock STI's and 06+ WRX's have a 99.5 clearance right now.

      Tyler A. @ RallySport Direct 1 year ago  
        
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