Doctor showing x ray of patient's lungs Stock Photo Alamy The Science Behind X Ray Imaging X Rays: MedlinePlus Film x ray skull and cervical spine lateral view eps 10 Stock Photo Alamy Normal Chest X Ray Dictation at Shirley Bock blog aFe MACHForce XP Exhausts Cat Back SS 409 EXH CB GM Diesel Trucks 06 07 V8 6.6L (td) LLY LBZ. aFe MACHForce XP Exhausts Cat Back SS 409 EXH CB GM Diesel Trucks 06 07 V8 6. 6L (td) LLY LBZ The new MACH Force XP exhaust is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4 in. 409 stainless steel tubing for maximum flow; increased horsepower; increased torque; and lower EGTs. MACH Force XP exhaust systems are the perfect combination of performance; fit; and value. All systems use factory mounting locations providing stability and hassle free installation. High quality OE style band clamps are used for a complete 360 deg. sealing surface. A free flowing 24 in. long muffler is used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque out of your rig. OE style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The bayonet tip holds the hanger bushing in place for an OE style fit that does not change with time. Large Bore HD 4 IN 409 Stainless Steel Cat Back Exhaust System w Polished Tip GM Diesel Trucks 06 07 V8 6. 6L (td) LLY LBZ