Borla CrateMuffler Stock SBF 289/302 (Exc. Coyote) ATAK 2.25in Inlet/Outlet Oval MufflerBorla CrateMuffler Stock SBF 289 302 (Exc. Coyote) ATAK 2. 25in Inlet Outlet Oval Muffler BORLA(r)'s CrateMuffler(r) is the world's first muffler purpose built to optimize the sound & power of crate and custom built motors. This CrateMuffler(r) features the aggressive ATAK(r) sound. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. The directional design provides custom sound, tuned for each