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JE 99.5mm 8.8:1 Billet FSR Piston Set (79mm Stroke) - Subaru WRX 2006-2014 / STi 2004-2021 (+Multiple Fitments)
Lease for as low as $/week
JE's billet racing pistons for Subaru EJ257 engines were originally created for Ken Block's Gymkhana STI racecar and are now available to the public. The pistons are 100% CNC machined from high quality 2618-T6 wrought aluminum bar stock and are specifically designed for high horsepower road and drag race engines. The pistons feature internal and external bracing for improved durability and strength. A unique "donut dish" crown and application-specific under crown profile properly redistributes heat and reduces stress concentrations experienced in high horsepower Subaru engines.
Unlike forged pistons, the billet pistons are machined on every surface allowing for all unnecessary weight to be removed during manufacturing. The result of this new process is a weight reduction of up to 32 grams compared to other piston designs! High quality 9310 steel wrist pins and JE Pro Seal Rings are included. For severe racing applications, upgraded Diamond Like Carbon (DLC) coated wrist pins are available.
- 100% CNC machined billet piston
- Specifically designed for high horsepower Subaru racing engines up to 1200hp
- Only 392 grams! Up to 32 grams lighter than other aftermarket pistons
- Manufactured from high quality, certified 2618-T6 aluminum alloy
- Internal and external strut braces
- Premium 9310 steel wrist pins included (.905 x 2.250"), DLC upgrade available
- JE Pro Seal Piston Rings Included (1.2, 1.2, 2.5mm)
- Tru Arc locks for easy installation
Specs:
- Bore: 99.5mm
- Size: STD
- Stroke: 79mm
- Rod: 130.5mm
- C/D: 30.7mm
- Head CC's: 57
- C/R with .040: 8.8:1
- Dome CC's: -14.1
- Gram: 392
- Footnote: Accepts Turbo / Nitrous / Made To Order
- Skirt: FSR
- Included Ring Set: JG4904-3917
Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new.
Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.
Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.
Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.
Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.
Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.
Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.
You can simply contact us via email / telephone for a live inventory check
Find more information at www.P65Warnings.ca.gov.