Siebert Performance Pro Series LS Pistons 4.000"-4.185", 1.050" CH

Siebert Performance Pro Series LS Pistons

💪 As used in our Pro & Elite Series 441 LS Engines, these pistons are engineered for maximum power and reliability. Designed in-house by Siebert Performance and manufactured by Wiseco, they’re built specifically for the Frankenstein M311 LS3-style 11° cylinder heads.

Compatible with 4.125" stroke setups and available in 4.000" to 4.185" bore sizes, they’re the perfect choice for big-inch LS builds where every ounce of performance matters.

🏆 Key Features:

-Proven in Competition: Standard in our Pro & Elite Series 441 LS builds

-Designed by Siebert Performance, manufactured by Wiseco for premium quality

-Bore sizes from 4.000" to 4.185"

-💥Large Dome Design for maximum compression — up to 15:1+

-.043", .043", 3mm ring grooves for top-tier sealing and durability

-🏁 Optimized for Frankenstein M311 11° LS3 heads for unmatched performance

⚡ For racers who demand elite-level performance, these pistons deliver the compression and durability your LS build needs to WIN.