MagnaFlow's revolutionary xMOD Series offers a completely modular exhaust system that takes modifying your vehicle’s exhaust to the next level of personalization with the following product line features: Configurable sound level provided by Supra xMOD Muffler Modules: offer MagnaFlow's proven straight-through design 5" round 8" long 3" core mufflers now feature race bred quick release v-band clamps for quick installation and removal for when you want that race car sound instead of the deep, aggressive signature MagnaFlow exhaust note. Supra xMOD xTreme Deletes: are equipped with the same v-band clamps allowing for the removal of the muffler modules for that xMOD xTreme sound experience. Take warning, while the xMOD systems are 100% emissions legal, the use of the xTreme deletes is recommended for track use only. Check local sound laws for street legality. Expandable flow capacity for big power mods with Supra xMOD Opti-Flow Modules: feature fast-flowing 3" mandrel bent stainless steel design correcting the flow restrictions of the ovalized factory pipe which traded better ground clearance for total flow. The xMOD Opti-Flow Modules are optimized for stock power plus minor modifications. Supra xMOD xTreme Flow Modules: feature increased flow capacity with 3.5" mandrel bent big bore design for big power modification support. The xMOD xTreme Flow Modules increase airflow up to 36%. ADDITIONAL FEATURES of the Supra xMOD system: retains the Sport mode exhaust valve functionality 1 lb under stock in heaviest configuration and 8.5 lbs off of stock in its lightest. provides a modest power gain over stock up to 4 HP peak with the stock calibration, but with additional aftermarket modifications, can contribute up to 14 HP peak over the stock exhaust lifetime warrantied stainless steel construction. MagnaFlow xMOD Series premium performance exhaust systems offer the unique ability to personalize and fine tune your exhaust for the exact power and sound you want and need!