Borla Crate Muffler Resonator 10" Long Body 14" Overall Round Stainless Steel Reversible 3" Center Inlet/ 4" Center Outlet
Highlights
- Reduces Sound Level 2-3 dB(A)
- T-304 Stainless Steel
- No Logo Embossment
- Proudly Made in the USA
Borla Crate Muffler Round Reversible Stainless Steel 10" Long Body and 14" Overall Resonator with a 3" Center Inlet and 4" Center Outlet.
This Resonator (400939) made by Borla is designed to decrease overall sound and can be used in any exhaust system of the same diameter. This product is the ideal choice for anyone wanting to reduce the sound level 2-3 dB(A). Its straight-through and reversible design will not destroy your vehicle’s performance and allows for a flexible installation. Its structure is 100% welded and uses high quality T-304 stainless steel that will resist rust. There is no logo embossment on this part. Other features include a free flow design for enhanced performance, high temperature continuous-filament fiber (CFF) acoustic material that contributes to sound control, and a natural mill finish that can be brushed or polished prior to being installed. Finally, this resonator (400939) is proudly manufactured in the USA!
Features and Benefits:
- Reduces Overall Sound
- Straight-Through Design
- No Logo Embossment
- Reversible Design
- T-304 Austenitic Stainless Steel
- 100% welded construction
- Free Flow Design
- High-Temp CFF Acoustic Material
- Natural Mill Finish
- Proudly made in the USA!
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Exhaust, Mustang Mufflers, Ford Focus ST Parts, Ford Bronco Parts

Vehicle Fitment
This product will fit the following Bronco years:
This product will fit the following C/K years:
- 1988,
- 1989,
- 1990,
- 1991,
- 1992,
- 1993,
- 1994,
- 1995,
- 1996,
- 1997,
- 1998,
This product will fit the following C10 years:
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
- 1980,
- 1981,
- 1982,
- 1983,
- 1984,
- 1985,
- 1986,
- 1987,
This product will fit the following F-100 years:
- 1948,
- 1949,
- 1950,
- 1951,
- 1952,
- 1953,
- 1954,
- 1955,
- 1956,
- 1957,
- 1958,
- 1959,
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
This product will fit the following F-150 years:
This product will fit the following Focus years:
This product will fit the following Mustang years:
- 1964.5,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
- 1980,
- 1981,
- 1982,
- 1983,
- 1984,
- 1985,
- 1986,
- 1987,
- 1988,
- 1989,
- 1990,
- 1991,
- 1992,
- 1993,
- 1994,
- 1995,
- 1996,
- 1997,
- 1998,
- 1999,
- 2000,
- 2001,
- 2002,
- 2003,
- 2004,
- 2005,
- 2006,
- 2007,
- 2008,
- 2009,
- 2010,
- 2011,
- 2012,
- 2013,
- 2014,
- 2015,
- 2016,
- 2017,
- 2018,
- 2019,
- 2020,
- 2021,
- 2022,
- 2023,
- 2024,
- 2025,