Borla CrateMuffler SBC Hot 350/383 2.5 inch Offset/Center 14in x 4.35in x 9in Oval Atak Muffler 2021-volkswagen-jetta-gli-s-esi5787094 By changing the block off

By changing the block off plates behind the center tip you can adjust the SPL (Sound Pressure Level) to your taste

For vehicles With Active Exhaust

The system contains a merge X-pipe for increased performance and improved sound

Includes ZR2 & AT4X models

Borla CrateMuffler SBC Hot 350/383 2.5 inch Offset/Center 14in x 4.35in x 9in Oval Atak Muffler 2021-volkswagen-jetta-gli-s-esi5787094 By changing the block offBORLA(r)'s CrateMuffler(r) is the world's first muffler purpose built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. This muffler is tuned for the Chevrolet Small Block 350 383 406 engine family. The directional design provides the aggressive ATAK(r) sound and will dramatically reduce, or eliminate drone on specified applications.