T409 Stainless Steel 4 Inch Cat Back Single Side Exit 4 Inch Resonator Back, Single Side Exit, T409 Stainless Steel MBRPs XP Series is the performance exhaust of choice for the enthusiast who needs a system that can take anything that the road throws at it.This systems rugged sixteen gauge T409 Stainless Steel construction can be counted on to withstand everything from salt to rocks, tar to grime. We have had such success with this line that we back it with a Lifetime Warranty.Built to Perform MBRPs performance exhaust systems are built to p