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 # 14392; dB Part # 24392 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 FX2 2011 to 2014 Ford F-150 FX4 2011 to 2014 Ford F-150 King Ranch 2011 to 2014 Ford F-150 Lariat 2011 to 2014 Ford F-150 Limited 2013 to 2014 Ford F-150 Platinum 2011 to 2014 Ford F-150 STX 2011 to 2014 Ford F-150 XL 2011 to 2014 Ford F-150 XLT 2011 to 2014