Borla 15-17 Grand Cherokee SRT 6.4L Resonator ATAKBuilt from premium T 304 stainless steel, superior to T 400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra smooth mandrel bends ensure maximum flow & power, and precision computer controlled CNC manufacturing ensures an accurate fit. Best of all, Borla stands behind every connection pipe with a Million Mile Warranty. Just what you? d expect from the world? s most experienced (and most winning)