CP Piston & Ring Set 78-83 Porsche 911SC 3.0L - 98mm Bore - 42cc Dome - Compression Ratio (10.5)

When you're rebuilding the top end of your 1978-1983 Porsche 911SC with the 3.0L engine, this forged piston and ring set from CP Pistons is what you get in the box: six pistons, six sets of piston rings, and wrist pins with clips. These aren't just stock replacements; they're built for performance and durability, featuring a 98mm bore and a 42cc dome that helps achieve a 10.5:1 compression ratio. This setup is designed to give your air-cooled flat-six a noticeable boost in power and responsiveness, especially when paired with other performance engine modifications.

CP Pistons is well-known for using strong, lightweight aluminum alloys for their forged pistons. This process creates a piston that's significantly more robust than cast aluminum, making it better able to withstand the higher cylinder pressures and temperatures that come with increased performance. The precise machining ensures a consistent bore size and a good seal with the cylinder walls, which is crucial for both power output and engine longevity. The included rings are matched to the pistons and bore size, simplifying the assembly process and ensuring proper sealing.

This set is a solid option for anyone looking to get the most out of their 911SC engine, whether for spirited street driving or track use. Keep in mind that this kit is not CARB approved and cannot be shipped to California. For optimal installation, always refer to the manufacturer's detailed service manual for specific torque specifications and assembly procedures.