81107 This Flowmaster® no resonator kit is designed specifically for 2015-2017 Ford Mustangs with the 3.7L engine and is a great way to increase the power and sound level of your Pony. The system is constructed with dual 2.25-inch stainless steel mandrel-bent tubing and includes our Scavenger Series® X-pipe chamber for a deep unique tone and maximum power. The system can be used with the factory rear muffler section, or with one of our axle-back exhaust systems and is covered by our Lifetime Limited Warranty. Features: Dyno Tuned For Maximum Performance Stainless Steel Construction Increases Sound and Power Scavenger X-pipe Collector Lifetime Limited Warranty Mandrel Bent Tubing Eliminates Resonator About Flowmaster Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound. SPECS Automotive Item Grade High Performance Brand Flowmaster Color Natural Emission Code 5 Exhaust Pipe Wall Maximum Gauge 16 Heat Shield No Inlet Connection Type Slip-Fit Inlet Diameter (in) 2.25 Material Stainless Steel Mount Type Yes Outlet Connection Type Slip-Fit Outlet Diameter (in) 2.25 Overall Length (in) 47.3 Product Type Exhaust Accessories Single Dual Dual System Type Exhaust Accessory Tube Diameter 2-1/4 inch Type of Component X-Pipe UPC 700042032044 California Proposition 65 Chemical Name Chromium (hexavalent compounds) Nickel (Metallic) California Proposition 65 Required Yes Part Number 81107 Instructions for Part# 81107 Warranty for Part# 81107 2015-2017 Ford Mustang Coupes and Convertibles with 3.7L engine.