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Cosworth Performance Racing Parts

Cosworth Performance Forged Pistons

The piston is one of the most important components within the engine. It can be subjected to directional change up to 285 times every second and must withstand acceleration forces of 8500g’s. Cosworth high performance forged pistons are designed and engineered to withstand this type of punishment and still perform. All Cosworth pistons are manufactured using the same methods as their Formula One pistons and include features such anti scuff skirt coating, ultra-strong pins, polished top and patented antidetonation bands. Additionally, each application uses a unique forging to minimize weight and ensure the strongest possible piston design.

cosworth pistons

Cosworth Performance Forged Pistons Feature:
  • Unique forgings for each application
  • ‘Xylan’ anti scuff skirt coating
  • Polished tops (reduces carbon build up and relieves stress)
  • Manufactured from proprietary alloy (CosAl 010)
  • Ultra strong pin
  • Patented anti-detonation bands

Forged Piston Sets - Includes pistons, pins and circlips
Subaru
PA2667Subaru WRX STI EJ25 (2.5L) 99.5mm 8.2:1cr
PA2667+025Subaru WRX STI EJ25 (2.5L) 99.75mm 8.2:1cr
PA2667+050Subaru WRX STI EJ25 (2.5L) 100.mm 8.2:1cr
PA2690Subaru WRX EJ20 (2.0L) 92.mm 8.0:1cr
PA2690+050Subaru WRX EJ20 (2.0L) 92.5mm 8.0:1cr
20002431 Subaru WRX STI EJ25 (2.6L) 99.5mm 8.2:1cr (For use with 81mm crankshaft)
20002432Subaru WRX STI EJ25 (2.6L) 99.75mm 8.2:1cr (For use with 81mm crankshaft)
20002433Subaru WRX STI EJ25 (2.6L) 100.mm 8.2:1cr (For use with 81mm crankshaft)
20002489 Subaru WRX EJ20 (2.2L) 92.mm 8.0:1cr (For use with 79mm crankshaft)
20002490  Subaru WRX EJ20 (2.2L) 92.5mm 8.0:1cr (For use with 79mm crankshaft)
Nissan
PA2688Nissan VQ35 (3.5L) High CR 95.5mm 10.3:1cr
PA2688+050Nissan VQ35 (3.5L) High CR 96.mm 10.3:1cr
PA2687Nissan VQ35 (3.5L) Low CR 95.5mm 8.8:1cr (Turbo application)
PA2687+050Nissan VQ35 (3.5L) Low CR 96.mm 8.8:1cr (Turbo application)
20002036Nissan VQ35 (3.5L) High CR 95.5mm 11.0:1cr
20002038Nissan VQ35 (3.5L) High CR 96.mm 11.0:1cr
Mitsubishi
PA2689Mitsubishi Evo IV-IX 4G63 (2.0L) 85mm 8.8:1cr
PA2689+100Mitsubishi Evo IV-IX 4G63 (2.0L) 86mm 8.8:1cr
PA2701+100Mitsubishi Evo IV-IX 4G63 (2.2L) 86mm 8.8:1cr For use with 94mm crank


Cosworth Performance Racing Piston Rings

Performance Piston Ring Sets For Cosworth Pistons
20001515Subaru WRX STI EJ25 (2.5L) 99.5mm
20001516Subaru WRX STI EJ25 (2.5L) 99.75mm
20001517Subaru WRX STI EJ25 (2.5L) 100.mm
PR7320Subaru WRX EJ20 (2.0L) 92.mm
PR7321Subaru WRX EJ20 (2.0L) 92.5mm
20001512Nissan VQ35 (3.5L) 95.5mm
20001514Nissan VQ35 (3.5L) 96.mm
PR7317Mitsubishi Evo 4G63 (2.0L) 85mm
20002246Mitsubishi Evo 4G63 (2.0L) 86mm



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