- Tested & professionally cleaned - Backed by 30-Day Warranty - Ships within 5–7 business days - Verify VIN and emissions code before ordering for exact fit - Trusted for efficiency and long Cylinder Head life." Used part – includes valve springs, retainers, and camshaft (if applicable). No rocker arms or lifters included unless noted. Recommend resurfacing and valve job prior to installation. 30-day warranty on casting integrity.