Quick view 2.5"Cat Back, Dual Split Side, T409, Chevy/GMC 2500 HD 6.0L EC-SB 2001 - 2006 SKU: S5010409 Compare $634.99 INSTALL INSTRUCTIONS MBRP S5010409 Instructions Armor Plus / formerly XP Series Rugged and dependable our Armor Plus Series is made of T409 stainless steel. It's designed and built to stand up to the harshest road conditions. We are so sure that our... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List