Vehicle Fitment: PHILTOP Catalytic Convertor Compatible with 2009-2013 Silverado/Sierra 1500/Avalanche 4.3/4.8/5.3/6.0L; ，2009-2014 Tahoe/Suburban 1500/Yukon/Yukon XL 1500 4.8/5.3/6.0L; .OE Number: Catalytic Converter OEM Part Number#50490 Stainless Steel Out Shell: The high flow catalytic converters with heavy-duty stainless steel construction feature maximum durability. Firmly welded connections can withstand high temper and pressures for longer service life. High Quality: This catalytic converter is produced by an ISO-certified company and contains a rust-resistant stainless steel tube body. The metal shell completely encloses the ceramic carrier, whose strong temperature resistance considerably boosts flow rate and surface area and boosts catalytic efficiency. improves clean air performance and returns the vehicle's silence. Easy Installation: The kit comes with necessary gaskets and hardware for replacement.so as to help you with hassle-free installation, no need to modify any part.Plug and play design, no modification or drilling, quick installation. Important Note: The direct-fit catalytic converters are compliant with EPA Standards. Thus, they can be used in most states except California, Maine & New York, not legal for use on vehicles required to meet CA emission standards.