Borla 40665 ProXS Universal Muffler 2.5" Offset In/Center Out 19" Oval T-304 SS

Vehicle Fitment

• Universal Fitment - Import and Domestic Cars/Trucks with 2.5" Exhaust

Fitment Notes

• Un-notched necks designed for weld-in installation
• For clamp install, use Borla 3" wide band clamps (Part# 18004)
• Reversible design for inlet/outlet orientation flexibility
• Notched neck version available (Part# 400484)
• Verify clearance for 4" H x 9.5" W oval body
• Professional exhaust shop installation recommended

Features

• Straight-through design for maximum exhaust flow
• Deep, aggressive tone with mild street-friendly volume
• 100% welded construction for strength and durability
• Reversible design mounts in either direction
• Premium T-304 stainless steel inside and out
• High-temp CFF acoustic material for sound control
• Natural mill finish; can be brushed or polished
• Made in USA

Specifications

• Part Number: 40665
• Brand: Borla
• Series: ProXS
• Type: Universal Performance Muffler
• Internal Design: Straight-Through
• Inlet: 2.5" Offset
• Outlet: 2.5" Center
• Body Shape: Oval (4" H x 9.5" W)
• Body Length: 19 inches
• Overall Length: 24 inches
• Material: T-304 Austenitic Stainless Steel
• Construction: 100% Welded
• Neck Style: Un-Notched (Weld-In)
• Finish: Natural Mill
• Reversible: Yes
• Weight: 11.65 lbs
• Quantity: Sold Individually
• Country of Origin: USA
• UPC: 808422406659
• Warranty: Borla Million-Mile Warranty

Included Components

• 1 Borla ProXS Universal Muffler

Product Description

The Borla 40665 ProXS Universal Muffler features an extended 19-inch body length for applications requiring additional sound attenuation or specific packaging constraints. Utilizing Borla's proven straight-through internal design with high-temperature continuous-filament fiber (CFF) acoustic material, this muffler delivers maximum exhaust flow while producing a deep, aggressive tone. Constructed entirely from premium T-304 austenitic stainless steel with 100% welded construction, the ProXS offers superior corrosion resistance compared to mild steel or 409 stainless alternatives. The reversible design and offset inlet/center outlet configuration provide installation flexibility for custom exhaust applications. Un-notched necks are optimized for weld-in installation, ensuring a permanent, leak-free connection. Made in the USA and backed by Borla's Million-Mile Warranty.