Mahle MS Chevrolet LS 5.3L 329cid 3.800in Bore x 1.299CH 3.622 Stroke 14.0cc 12.5 CR - Pist Set of 8

If you're rebuilding the top end of your Chevrolet LS 5.3L engine, a solid set of pistons is crucial for performance and reliability. This set from Mahle is built for demanding builds, offering a 12.5:1 compression ratio with cathedral port heads, making it a strong choice for those looking to get more out of their LS engine.

These pistons are forged from 2618 aluminum, a material known for its strength and ability to withstand high temperatures and pressures, which is essential for boosted or high-performance naturally aspirated applications. The set includes eight pistons, each with a 3.800-inch bore and a 1.299-inch compression height, designed to work with a 3.622-inch stroke and a 6.125-inch rod. The dome volume is 14.0cc, contributing to that 12.5:1 compression ratio. Each piston weighs in at 457 grams, balancing strength with reasonable reciprocating mass for the application. The 0.927-inch pin size is standard for many LS applications.

When installing these pistons, remember they are designed for LS1/2/6 style cathedral port heads. It's always a good idea to consult your engine builder or a trusted mechanic for specific installation procedures and torque specifications to ensure optimal performance and longevity for your rebuilt engine. Please note that this piston set is not CARB approved and cannot be shipped to California.