Borla · New
Borla Specialty Muffler 2.75in Center In/Out 6.75in Dia. 24in Body 29in OAL S-Type Un-Notched
MPN 401664 · Store SKU bor401664
Supplier stock checked 11/7/2026, 7:24:37 AM UTC. Adding a part does not reserve it.
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Product details
Developed for truck applications and other applications that require a long body muffler. This muffler is considered an "S-Type" muffler when compared to the 7.75" diameter x 24" long body BORLA(r) Specialty mufflers and used on the same application. Un-notched necks are designed for weld in installation. Alternate muffler with Notched necks is 400130. Use wide band style clamps 18327 (clamps not included). Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel for superior corrosion resistance. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Best of all, it's made in the USA and backed by BORLA(r) 's Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. Specialty Muffler - Heavy Duty (Truck) - 2.75" Center Inlet/ 2.75" Center Outlet 6.75" Round 24" Long Body 29" Overall Length. Universal Part. Reversible Design. Un-notched Neck. Specialty Muffler - S-Type
Manufacturer fitment & guides
Check 401664 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
