Mahle 4.1 liter piston and cylinder conversion kit for 996/997 turbo / GT2 & GT2 rs - increased horsepower and torque. - forged pistons with deeper, mirrored valve pockets. - piston pin bore is off center (deaxiert) for factory quiet operation. - 9.1:1 compression. - 106 mm bore. - piston rings installed directly on the pistons for ease of installation. - made in Germany by mahle gmbh. Water channels and case must be machined to fit. Please add the following to your order: 2 qty. Base gaskets, part # FVD10303905zfd 2 qty. Head gaskets, part # FVD10303905zkd 1 qty. O- ring base set, part # FVD10303905or 1 qty. O- ring head set, part # FVD10303905oro please note: horsepower and torque gains depend on the software used, camshafts, crankshaft and other internal modifications. 750+ hp and torque can be achieved with use of these pistons and cylinders with a proper engine build and software. Contact your sales person for more accurate numbers depending on your plans for the motor. Mahle pistons are forged for substantially higher and more uniform strength over pistons that are cast. Mahle cylinders are manufactured from st52 steel which has extremely high thermal resistance, they are nikasil coated which reduces wear and friction. Installation is made easy as the pistons and cylinders are slip fit and do not require machine work to the housing, they are also factory quiet as the piston pin bore is off centered. We take things on step further to ensure reliability by having the piston rings (sealing and oil scrapers) pre-installed.

This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.