Built from heavy 400 stainless, replaces crack-prone stock piece. Easy bolt-on installation. Thick 1/2-inch flange is double welded, machined dead flat and precisely fitted to resist warping and cracking. With more power, quicker acceleration and tougher construction than ever, the Banks TorqueTube® for the Jeep 4.0 liter out muscles any competitive exhaust manifold: period! Made from super-durable, mandrel-bent 409 stainless steel tubing and sporting a 1/2"-thick precision ported and machined flange. Powering through the roughest terrain is no longer a question. And cracking... a thing of the past when you arm your Jeep with Banks TorqueTubes.Key Features: Virtually indestructible 100% Stainless Steel. Mandrel-formed tubes tune exhaust flow for maximum torque. Maximize exhaust extraction. Flanges welded on both sides, then milled flat. Seamless high-velocity collector. Pulls exhaust and slashes backpressure. Heavy 400 stainless replaces crack-prone stock piece. Bolts on. 1/2 inch thick flanges won't warp or flex