Borla Thumper Boomers 23-1/2” Muffler with 4” Round Tip

When hunting for a muffler that rules the streets and tracks, you’ll love the dyno-proven power of this Borla muffler (40057). Part of their Thumper Boomers line, the 23-1/2” muffler is expertly engineered with race-winning technology that creates the best flow. It uses T-304 stainless steel tubing, 100% welding it for the utmost durability so you can make the most of its modest horsepower boost. A high-temperature, CFF acoustic material then controls sound, balancing a head-turning exhaust note without any droning.

Features and Benefits:
- Universal, dyno & race-proven muffler
- Race-winning technology improves flow
- Adds modest horsepower boost
- Excels in street & track applications
- 100% welded, T-304 stainless steel tubing
- Uses high-temp, continuous-filament fiber (CFF) material
- Bold exhaust note w/ minimal droning
- 4” round tip is integrated
- Gorgeous, fully polished finish

Specifications:
- Overall length: 23-1/2”
- Case dimensions: 14” X 4-1/4” X 7.88”
- Center inlet: 2-1/4”
- Round tip: 4”