CP Forged Pistons w/ PVD Rings SR20 86.5mm 8.5:1

CP Pistons SR20DE / SR20DET Forged Pistons with PVD Rings
86.5mm Bore | 8.5:1 Compression | -15.5cc
SKU: SC7327PVD

CP Pistons are widely regarded as one of the leading manufacturers of high-performance forged pistons, trusted in professional motorsport and high-horsepower street builds worldwide. This shelf piston set for Nissan SR20DE and SR20DET engines delivers race-proven design features typically reserved for custom pistons—without the added cost or lead time.

Designed specifically for turbocharged SR20 applications, these pistons offer excellent strength, durability, and ring seal under high boost and high RPM conditions. Each piston is precision CNC-machined in the USA and balanced to within ±1 gram for smooth, reliable operation.

Supplied complete with PVD-coated piston rings, wrist pins, and locks, this is a true drop-in forged piston solution for serious SR20 builds.

 
Key Specifications
Engine Compatibility: Nissan SR20DE / SR20DET
Bore Size: 86.5mm
Compression Ratio: 8.5:1
Dome Volume: -15.5cc
Ring Package: PVD-coated performance rings
Material: Forged aluminium
Manufacturing: Fully CNC machined, USA made
 
Standard CP Pistons Features
Dedicated SR20-specific forgings
Balanced to within ±1 gram
Wrist pins, pin fitting, and locks included
Precision-honed pin bores
Accumulator groove (standard)
Dual forced pin oilers
Anti-detonation grooves
Fully CNC machined construction
 
Advanced Design & Performance Benefits
Accumulator Groove
A V-shaped groove machined into the second ring land increases volume between the top and second rings. This allows combustion gases to dissipate more effectively, reducing top ring flutter, improving ring seal, and increasing power while extending ring life.

Dual Forced Pin Oilers
Unlike single oiling designs, CP’s dual pin oilers deliver twice the oil supply to the wrist pin. Combined with an annular oil reservoir, this dramatically improves lubrication under sustained high load and RPM.

Anti-Detonation (Contact Reduction) Grooves
These grooves reduce piston-to-cylinder contact during extreme temperatures and RPM while disrupting detonation pressure waves, protecting the top ring and improving durability in high-boost applications.

Optimised Cam & Barrel Profiles
Each piston features an application-specific cam and barrel skirt profile, developed through extensive R&D. This results in:

Tighter piston-to-wall clearances
Reduced cold-start and operating noise
Improved ring seal
Increased power output
Greater long-term durability
Precision Pin Fitting & Broached Pin Bores
Pin bores are precision-honed to exact clearances, ensuring optimal oil film control. Broached oil slots allow consistent lubrication and accommodate wrist pin deformation under extreme load, preventing galling.

 
Applications:
Nissan 180SX S13 SR20DET Non-VVT
Nissan Silvia PS13 SR20DET Non-VVT
Nissan Silvia S14 200SX SR20DET VVT

Engine: SR20DE / SR20DET