Borla 401664 S-Type Universal Specialty Muffler 2.75" Center/Center Round

Vehicle Fitment

• Universal fit -- not vehicle-specific
• Designed for truck and SUV applications requiring a long body muffler
• Fits exhaust systems with 2.75" outside diameter piping

Fitment Notes

• Un-notched necks -- designed for weld-in installation
• If clamping, use Borla 18005 (3" wide band clamps, sold separately)
• Alternate notched-neck version for clamp-in install: Borla 400130 (use 1" wide band clamps 18327)
• Reversible design -- can be installed in either direction
• S-Type sound character compared to 7.75" diameter Borla Specialty mufflers on the same application
• All welding must be made at the neck nipples only -- welding to shell or end caps voids warranty
• Natural mill finish can be brushed or polished prior to installation

Features

• T-304 austenitic stainless steel construction -- will never rust
• 100% welded seams for maximum strength and durability
• Free-flow internal design for improved exhaust velocity and performance
• High-temperature continuous-filament fiber (CFF) acoustic packing for sound control
• Reversible center/center design for flexible installation orientation
• Long body round case optimized for truck and SUV underbody clearance

Specifications

• Part Number: 401664
• Muffler Type: Specialty -- Heavy Duty (Truck)
• Sound Level: S-Type
• Inlet: 2.75" Center (I.D.)
• Outlet: 2.75" Center (O.D.)
• Body Shape: Round
• Body Diameter: 6.75"
• Body Length: 24"
• Overall Length: 29"
• Neck Style: Un-notched (weld-in)
• Material: T-304 Austenitic Stainless Steel
• Finish: Natural mill (stainless)

Included Components

• Universal performance muffler (1)
• Clamps not included -- sold separately

Product Description

The Borla 401664 is a universal specialty performance muffler developed for trucks, SUVs, and other applications that require a long body design. Featuring a 6.75" round case with a 24" body length and 29" overall length, this muffler delivers S-Type sound character through its free-flow internal design and high-temperature continuous-filament fiber acoustic packing. The 2.75" center inlet and center outlet configuration with un-notched necks is designed for weld-in installation, though it can also be clamped using Borla 18005 wide band clamps. The reversible design allows installation in either direction for maximum flexibility. Constructed entirely from aircraft-grade T-304 austenitic stainless steel with 100% welded seams, this muffler is built to resist corrosion indefinitely. The natural mill finish can be brushed or polished to match your exhaust setup. Backed by Borla's Million-Mile Warranty. Made in the USA.