Borla Cat-Back And Axle-Back multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla Sound of Power respected by motoring enthusiasts everywhere. Each system is built 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 system with a Million-Mile Warranty. Just what you?d expect from the world?s most experienced (and most winning) exhaust brand. TUNDRA 14-19 4.6L/5.7L V8 AT 2/4WD CREW MAX SB; DOUBLE CAB STD B; RC LB; S RD RL AC BC SR 2.25in. TIP 4in. RD X 14in. BLACK CHROME. 2014-2018 Toyota Tundra 4.6L/5.7L V8 Automatic Transmission 2 & 4Wheel Drive Crew Max, Short Bed, Double Cab Standard Bed