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Built for people who don't baby their setups, the Lambda Raceworks 4.1 pistons are designed to survive power levels most parts can't touch. These are rated for builds pushing up to 1300HP, using a high-strength forged alloy that handles extreme cylinder pressure, detonation events, and repeated abuse without folding. They're not stock replacements — they're a solution for serious power. Each piston is thermal barrier coated to reflect heat away from the crown, keeping combustion temps under control and protecting the piston during high boost and aggressive tuning. That means more consistency, less heat soak, and better durability when you're leaning on the setup. The lowered compression design gives you headroom to run more boost safely, making them ideal for big turbo, high ethanol, or race setups where cylinder pressure climbs fast. Bottom line: • Built for extreme power (up to 1300HP) • Heat-repelling coating for thermal control • Lower compression for higher boost capability • Stronger construction for real abuse, not dyno pulls only
Lambda Raceworks big bore pistons are custom built to order. Due to the nature of these custom performance products, all sales are considered final once production or assembly begins. Built-To-Order Policy: • Products labeled as built-to-order, custom-built, or made-to-order are non-refundable and non-returnable. • Orders cannot be canceled once parts procurement.
These pistons are designed for race-engine applications. Proper installation, machining clearances, and tuning are the responsibility of the engine builder. SleepyTuned is not liable for damage resulting from improper installation, tuning, or misuse.