Exhaust Sound and Flow: The resonator delete kit replaces the stock resonator found in 2011 to 2014 F-150 trucks, freeing the exhaust path and increasing sound. CNC Machined Donut Connection: CORSAs machined stainless steel donut connection was designed exclusively to match the unique needs of the Ford F-150 exhaust system to create a precision fit with no exhaust leaks. Laser Cut 3/8 in. Stainless Flange: CORSA designed a flange with unmatched fit and durability to withstand the abuse of daily travel. Easy Installation and Fitment: F-150 resonator delete kits bolt directly onto CORSA exhaust systems and stock F-150 systems. Fits to CORSA Part # 14387 May exhibit unwanted tones under heavier than normal load conditions Exclusively Designed CNC Machined Donut Connection Direct Bolt On To CORSA Exhaust and Stock Systems Laser Cut 3/8 in. Stainless Steel Flange Replaces The Stock F-150 Resonator Easy Bolt-On Installation Limited Lifetime Warranty No Welding Required Made in the U.S.A. Fitment: Ford F-150 SVT Raptor 2011 to 2014