MAHLE Motorsport recently introduced the GT-R 4.1L Stroker PowerPak Plus Piston Kit. Developed alongside the 3,000-horsepower Skyline GTRs, the MAHLE Motorsport GTR 4.1L PowerPak kit was engineered for high-horsepower applications.
The new shelf-stock GT-R PowerPak Plus kit (part No. 930285660) features a lightweight thick slipper skirt-style forging manufactured from 2618 aluminum alloy for additional high-temp strength. MAHLE’s GRAFAL skirt coating reduces friction and increases scruffing resistance by providing a unique cushioning property that absorbs hard contact between the piston skirt and the cylinder bore, according to the company.
Top and second ring lands are optimized for higher piston speeds and boost pressure. The hard anodized top ring groove protects against micro-welding, ensuring optimum ring performance over the life of the engine. Designed with larger valve pockets to accommodate up to +1.00 mm larger valve diameters, as well as wrist-pin support strengthened, the pistons are able to handle higher inertia loads of a large-output racing engine.
The GT-R PowerPak Plus Kit comes complete with a nitride steel 1.2 mm top, 1.2 mm tapered 2nd and 2.5 mm oil ring set for superior ring-to-cylinder sealing with low mass and an extended RPM range without a loss of ring stability, according to MAHLE. This kit accommodates most aftermarket connecting rods.
