Borla 400840 CrateMuffler?. CrateMuffler?. Small Block Fits Chevrolet High Output 35. Part #: 400840. Small Block Fits Chevrolet High Output 350/ 383/ 406 V8. Warranty Type: Manufacturer Warranty. Check your applicable laws and manufacturer’s publication(s) and/or website(s) for manufacturer’s warranty, maintenance, safety, mounting and any regulatory compliance/noncompliance (including California CARB - California Air Resource Board) information.
