NOTE: Mahle Motorsports lists this kit as "964 NA 3.6L to 3.8L" but due to the HIGHER compression ratio of their kits offered we call it the 964 993 RSR Kit. Mahle Motorsports 3.6L to 3.8L RS Conversion Piston And Cylinder Set For 1989-1994 Porsche 964 C2 / C41995-1998 Porsche 993 C2 / C412.6:1 Compression @ 1mm Deck Height 76.4mm Stroke and 127mm Rod 102mm Bore / 107mm Sleeve - Slip-In Fitment To Engine Case Compatible With Factory DME Fuel ManagementMahle Motorsports - Sold As A Set (6pcs) - 1 Set Per EngineThis Set Includes: (Qty 6x) Pistons # PP102-011 (Qty 6X) Cylinders # PC102-002 (Qty 6x) Wrist Pins (Qty 12x) Wrist Pin Circlips (Qty 6x) Piston Ring Sets Checkout projects featuring the productShow off your engine conversion with our 3.8L badge or 3.8L Keychain Additional Notes: The Arrow Mark On The Piston Crown Must Point Towards The Flywheel During Engine Assembly Ring # 09299380 is the top ring, # 09299381 is the middle ring. For Naturally Aspirated Engines (NOT-Turbo) Use With Recommended Items (All Sold Separate): 964 EURO RSR Cams (Mechanical Rocker) / 993 Euro RSR Cams (Hydraulic Rocker) 964 993 RS Flywheel & Clutch Package Performance Exhaust 964 ECU Performance Chip / 993 ECU Performance Tune Supersedes Part Numbers: PS102-003Alternate Part Numbers: PS102 017 / PS102-017 / PS102.017 / PS102017 / PS102 07/29/2026