NOTE: Mahle Motorsports lists this kit as "993 RSR 3.8L" but it has the LOWER compression ratio of their kits offered. We call it the 964 993 RS Kit. Porsche 993 3.6L To 3.8L RS Conversion Piston And Cylinder Set For 1989-1998 Porsche 964 / 993 Carrera Naturally Aspirated Engines 11.4:1 Compression @ 1mm Deck Height 76.4mm Stroke and 127mm Rod 102mm Bore - 107mm Sleeve - Slip-In Fit Cylinder Compatible With Factory DME Fuel Management Mahle Motorsports - Sold As A Set (6pcs) - 1 Set Per Engine Checkout projects featuring the productShow off your engine conversion with our 3.8L deck lid badge This Set Includes: (Qty 6x) Piston # PP102-014 (Qty 6x) Cylinder # PC102-002 (Qty 6x) Wrist Pins (Qty 12x) Pin Circlips (Qty 6x) Piston Ring Sets Additional Notes: Slip-In Fit - Deep Valve Pockets And Symmetrical Crown. Pin Boss Spacing = 22.6 mm Requires RSR Type Connecting Rods Ring # 09299380 Is The Top Ring - # 09299381 Is The Middle Ring. The Arrow Mark On The Piston Crown Must Point Towards The Flywheel During Engine Assembly. Supersedes Part Numbers: PS102-015Alternate Part Numbers: ENG PS102 022 / PS102-022 / PS102.022 / PS102022 / PS102 015 / PS102-015 / PS102015 07/29/2026