Mahle MS Piston Set GM LSX 402cid 4.0x1.110RCH 4.0in Stk 6.125in Rod .927 Pin -14cc 9.9CR - Set of 8

This Mahle MS Piston Set gives you everything you need to rebuild the heart of your GM LSX engine for a 402 cubic inch displacement. Inside this box, you'll find a complete set of eight forged pistons, designed to work with a 4.000-inch bore and a 6.125-inch connecting rod. They feature a .927-inch pin diameter and a -14cc dish volume, which helps achieve a 9.9:1 compression ratio when paired with a 4.000-inch stroke crankshaft and appropriate cylinder heads.

Mahle uses 2618 aluminum for these pistons, a well-known material in performance applications for its strength and durability under high stress. Each piston weighs in at approximately 399 grams, keeping rotating assembly weight manageable for good engine response. The 1.110RCH specification refers to the piston crown's radial clearance, an important detail for proper engine assembly and performance. These pistons are built to handle the demands of a performance-oriented LSX build.

When installing these pistons, ensure you follow the manufacturer's recommended clearances and assembly procedures. Because these are a performance part, it's crucial to have them installed by a qualified mechanic who understands the nuances of engine building. Remember that this piston set is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation guide for precise specifications and any additional components you might need for your specific build.