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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

Cosworth Forged Piston Sets - Includes pistons, pins and circlips-rings not included
Subaru
20003674Subaru WRX STi EJ25 (2.5L) 99.5mm 8.2:1cr
20003675Subaru WRX STi EJ25 (2.5L) 99.75mm 8.2:1cr
20003676Subaru WRX STi EJ25 (2.5L) 100.mm 8.2:1cr
20003677Subaru WRX EJ20 (2.0L) 92.mm 8.0:1cr
20003678Subaru WRX EJ20 (2.0L) 92.5mm 8.0:1cr
20003682Subaru WRX STi EJ25 (2.6L) 99.5mm 8.2:1cr (For use with 81mm crankshaft)
20003683Subaru WRX STi EJ25 (2.6L) 99.75mm 8.2:1cr (For use with 81mm crankshaft)
20003684Subaru WRX STi EJ25 (2.6L) 100.mm 8.2:1cr (For use with 81mm crankshaft)
20004531Subaru WRX STi EJ25 (2.5L) 99.5mm 9.2:1cr
20004532Subaru WRX STi EJ25 (2.5L) 99.75mm 9.2:1cr
20004533Subaru WRX STi EJ25 (2.5L) 100.mm 9.2:1cr
20004534Subaru WRX STi EJ25 (2.6L) 99.5mm 9.2:1cr (For use with 81mm crankshaft)
20004535Subaru WRX STi EJ25 (2.6L) 99.75mm 9.2:1cr (For use with 81mm crankshaft)
20004536Subaru WRX STi EJ25 (2.6L) 100.mm 9.2:1cr (For use with 81mm crankshaft)
20003685Subaru WRX EJ20 (2.2L) 92.mm 8.5:1cr (For use with 79mm crankshaft)
20003687Subaru WRX EJ20 (2.2L) 92.5mm 8.5:1cr (For use with 79mm crankshaft)
Nissan
20003223Nissan VQ35 (3.5L) High CR 95.5mm 11.0:1cr
20003225Nissan VQ35 (3.5L) High CR 96.mm 11.0:1cr
20003679Nissan VQ35 (3.5L) Low CR 95.5mm 8.8:1cr (Turbo application)
20003681Nissan VQ35 (3.5L) Low CR 96.mm 8.8:1cr (Turbo application)
20005861Nissan RB26DETT 86.5mm 8.5:1cr-Stroker
20005862Nissan RB26DETT 87 mm 8.5:1cr-Stroker
20005863Nissan RB26DETT 87.5mm 8.5:1cr-Stroker
Mitsubishi
20003688Mitsubishi Evo IV-IX 4G63 (2.0L) 85mm 8.8:1cr
20003690Mitsubishi Evo IV-IX 4G63 (2.0L) 86mm 8.8:1cr
20003693Mitsubishi Evo IV-IX 4G63 (2.2L) 86mm 8.8:1cr For use with 94mm crank
20005129Mitsubishi 4B11 (2.0L) 86mm 9.0:1cr
20005130Mitsubishi 4B11 (2.0L) 86.5mm 9.0:1cr
20005131Mitsubishi 4B11 (2.0L) 87mm 9.0:1cr
20005856Mitsubishi 4B11 (2.2L) 86mm 9.0:1cr For use with 94mm crank
20005859Mitsubishi 4B11 (2.2L) 86.5mm 9.0:1cr For use with 94mm crank
20005860Mitsubishi 4B11 (2.2L) 87mm 9.0:1cr For use with 94mm crank
Honda
20005865Honda K20A 86mm 12:1cr
20005866Honda K20A 86.25mm 12:1cr
20005867Honda K20A 86.5mm 12:1cr
Subaru Single piston with pin and clips
20000897Subaru WRX STi EJ25 (2.5L) 99.5mm 8.2:1cr
20000898Subaru WRX STi EJ25 (2.5L) 99.75mm 8.2:1cr
20000899Subaru WRX STi EJ25 (2.5L) 100.mm 8.2:1cr
20002111Subaru WRX EJ20 (2.0L) 92.mm 8.0:1cr
20002112Subaru WRX EJ20 (2.0L) 92.5mm 8.0:1cr
20002431Subaru 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)
20002489Subaru WRX EJ20 (2.2L) 92.mm 8.5:1cr (For use with 79mm crankshaft)
20002491Subaru WRX EJ20 (2.2L) 92.5mm 8.5:1cr (For use with 79mm crankshaft)
20004522Subaru WRX STi EJ25 (2.5L) 99.5mm 9.2:1cr
20004523Subaru WRX STi EJ25 (2.5L) 99.75mm 9.2:1cr
20004524Subaru WRX STi EJ25 (2.5L) 100.mm 9.2:1cr
20004528Subaru WRX STi EJ25 (2.6L) 99.5mm 9.2:1cr (For use with 81mm crankshaft)
20004529Subaru WRX STi EJ25 (2.6L) 99.75mm 9.2:1cr (For use with 81mm crankshaft)
20004530Subaru WRX STi EJ25 (2.6L) 100.mm 9.2:1cr (For use with 81mm crankshaft)
Nissan Single piston with pin and clips
20002036Nissan VQ35 (3.5L) High CR 95.5mm 11.0:1cr (Left hand bank)
20002038Nissan VQ35 (3.5L) High CR 96.mm 11.0:1cr (Left hand bank)
20002039Nissan VQ35 (3.5L) High CR 95.5mm 11.0:1cr (Right hand bank)
20002041Nissan VQ35 (3.5L) High CR 96.mm 11.0:1cr (Right hand bank)
20002132Nissan VQ35 (3.5L) Low CR 95.5mm 8.8:1cr (Turbo application)
20002134Nissan VQ35 (3.5L) Low CR 96.mm 8.8:1cr (Turbo application)
20005791Nissan RB26DETT 86.5mm 8.5:1cr-Stroker
20005792Nissan RB26DETT 87 mm 8.5:1cr-Stroker
20005793Nissan RB26DETT 87.5mm 8.5:1cr-Stroker
Mitsubishi Single piston with pin and clips
20000832Mitsubishi Evo IV-IX 4G63 (2.0L) 85mm 8.8:1cr
20000834Mitsubishi Evo IV-IX 4G63 (2.0L) 86mm 8.8:1cr
20000971Mitsubishi Evo IV-IX 4G63 (2.2L) 86mm 8.8:1cr For use with 94mm crank
20004488Mitsubishi 4B11 (2.0L) 86mm 9.0:1cr
20004675Mitsubishi 4B11 (2.0L) 86.5mm 9.0:1cr
20004676Mitsubishi 4B11 (2.0L) 87mm 9.0:1cr
20005783Mitsubishi 4B11 (2.2L) 86mm 9.0:1cr For use with 94mm crank
20005784Mitsubishi 4B11 (2.2L) 86.5mm 9.0:1cr For use with 94mm crank
20005785Mitsubishi 4B11 (2.2L) 87mm 9.0:1cr For use with 94mm crank
Honda Single piston with pin and clips
20005799Honda K20A 86mm 12:1cr
20005800Honda K20A 86.25mm 12:1cr
20005801Honda K20A 86.5mm 12:1cr
Spare Piston Pins and Circlips
PA267423mm Pin, Subaru EJ20 / EJ25 Piston
PA184622mm Pin, Mitsubishi 4G63 Piston
PA125122mm Pin, Nissan VQ Piston
PP5433Circlip, 23mm Subaru EJ20 / EJ25 Piston. 2 req per piston
PP2371Circlip, 22mm Nissan / Mitsubishi Piston. 2 req per piston
SB8004Circlip install tool, Subaru


Cosworth Performance Racing Piston Rings

Cosworth 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
20005160Subaru WRX EJ20 (2.0L) 92.mm
20005161Subaru WRX EJ20 (2.0L) 92.5mm
20003605Subaru WRX EJ20 (2.0L) 92.mm (Use with Stroker pistons 20002489/ 20003685)
20003607Subaru WRX EJ20 (2.0L) 92.5mm (Use with Stroker pistons 20002491/ 20003687)
20001512Nissan VQ35 (3.5L) 95.5mm
20001514Nissan VQ35 (3.5L) 96.mm
PR7317Mitsubishi Evo 4G63 (2.0L) 85mm
20002246Mitsubishi Evo 4G63/4B11 86mm
20005705Mitsubishi Evo 4B11 86.5mm
20005706Mitsubishi Evo 4B11 87mm
LEFT COLUMN
RIGHT COLUMN