Borla 401664 Specialty S-Type Muffler, 2.75-Inch Center Inlet and Outlet, 6.75-Inch Round Body

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.

• Un-notched necks are designed for weld in installation. If clamping, use 3" wide band clamps 18005.
• Alternate muffler with Notched neck is 400130. Use 1" wide band clamps 18327.
• Long body design works well on SUV and truck applications
• Universal muffler. Reversible design.

The Borla 401664 Specialty S-Type Muffler is designed for trucks, SUVs, and other applications that require a long-body muffler. With a 2.75-inch center inlet and center outlet, this universal muffler provides a free-flowing exhaust path to support improved performance while maintaining effective sound control. Its reversible design allows flexible installation positioning, making it suitable for a wide range of custom exhaust systems.

Constructed from high-quality T-304 austenitic stainless steel, the Borla 401664 delivers excellent corrosion resistance and long-term durability. Its fully welded construction adds strength, while high-temperature continuous-filament fiber acoustic material helps manage exhaust sound. The natural mill finish may be brushed or polished before installation for a customized appearance. Un-notched necks are intended for weld-in installation; when clamping is preferred, use appropriate wide-band clamps. This muffler is made in the USA and backed by Borla's Million-Mile Warranty.

• Brief Description: Universal, reversible S-Type specialty muffler for truck, SUV, and custom exhaust applications.
• Key Feature: Free-flow design supports improved exhaust performance.
• Key Feature: T-304 stainless steel provides superior corrosion resistance.
• Key Feature: Fully welded construction delivers added strength and durability.
• Key Feature: High-temperature continuous-filament fiber acoustic material provides sound control.
• Product Specification: Inlet size: 2.75 inches.
• Product Specification: Outlet size: 2.75 inches.
• Product Specification: Inlet and outlet configuration: Center inlet and center outlet.
• Product Specification: Muffler body shape: Round.
• Product Specification: Body length: 24 inches.
• Product Specification: Overall length: 29 inches.
• Product Specification: Installation neck: Un-notched, intended for weld-in installation.
• Product Specification: Finish: Natural mill stainless steel.
• What's Included: One Borla 401664 Specialty Muffler. Clamps and installation hardware are not included.

Fitment: This is a universal muffler and does not provide vehicle-specific bolt-on fitment. It is intended for custom exhaust installation on compatible truck, SUV, and other applications. For clamped installation, use suitable wide-band clamps; alternate Borla muffler part number 400130 features notched necks.

Features:

• Long-body S-Type design is well suited for truck and SUV exhaust applications.
• Reversible construction provides installation flexibility.
• T-304 austenitic stainless steel resists corrosion for lasting durability.
• Free-flow internal design supports improved exhaust performance.
• Fully welded construction increases structural strength.
• Continuous-filament fiber acoustic material helps control exhaust sound.
• Un-notched necks are designed for weld-in installation.
• Made in the USA and backed by Borla's Million-Mile Warranty.

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1