Borla Boomer Muffler Thumper Oval 2-1/4in In 4in Side Round Out

This is the Borla Boomer Thumper muffler, a universal-fit part designed to give your exhaust system a more aggressive sound and improved flow. It features a 2-1/4 inch center inlet and a single 4 inch round outlet, with an oval body measuring 4.25 inches by 7.88 inches and 14 inches long. The overall length of the muffler is 23.5 inches.

Borla builds these mufflers using T-304 austenitic stainless steel, which is known for its strength and resistance to corrosion, and they are 100% welded for added durability. Inside, high-temperature continuous-filament fiber acoustic material is used to manage sound, aiming for a head-turning tone without being overly harsh. The manufacturer claims this muffler can add a modest boost in horsepower, typically in the 7-10 HP range, thanks to its race-proven technology that enhances exhaust flow. The natural mill finish can be polished before installation to give it a custom look.

Because this is a universal muffler, you'll want to confirm that the inlet and outlet sizes, as well as the overall dimensions, will work with your specific exhaust setup. It's a well-built option from a popular brand, backed by Borla's Million-Mile Warranty.