Approved Turbo Components specializes in the overhaul or exchange of turbocharger systems. For technical assistance contact Mary Whitehall at mary@approvedturbo.com or call (800) 523-4809, (559) 627-3600 or (559) 805-5092 (cell). 18-month unlimited hours warranty. Hours: 8 a.m. to 5 p.m. PST.