Darton Sleeves is a USA-based leader in performance engine enhancement, specialising in high-strength cylinder and block-sleeve systems. Their ductile-iron sleeves and press-fit liners allow precise bore sizing, improved cooling and superior wear resistance—ideal for high-boost or high-RPM engines. Designed for direct installation without machining modifications, Darton sleeves restore factory geometry or enable oversized bores, giving builders a simple path to reliable, long-lasting engine performance.