The Borla 40364 ProXS universal muffler is a high-performance solution for anyone upgrading or fabricating a 2.5? exhaust system. With a straight-through, reversible design, this center-in/center-out muffler maximizes exhaust velocity and provides a deep, refined tone without excess drone. It's compact yet performance-ready-ideal for street cars, track builds, or custom applications.

Crafted from 100% welded T?304 stainless steel inside and out, the 40364 offers industry-leading durability and corrosion resistance. Its internal high-temperature acoustic packing ensures excellent sound tuning and long-term performance. Installation is weld-in or via clamp (Borla 18004 recommended), and the muffler's oval shape provides flexibility for tighter underbody clearances.

Vehicle Fitment:

• Universal fitment for all 2.5? exhaust systems
• Compatible with most cars, trucks, and SUVs
• Center-in, center-out pipe configuration (2.5)
• Reversible orientation – inlet and outlet may be swapped
• Install via welding or 3? band clamp (Borla 18004 recommended)

Features:

• Straight-through free-flow design increases performance
• Constructed inside and out with T?304 stainless steel for superior corrosion resistance
• 100% welded – no internal seams or fail points
• High-temperature acoustic fiber packing reduces drone and refines tone
• Reversible for flexible installation on custom systems
• Natural mill finish – polishable for custom builds

Specifications:

• Part Number: 40364
• Inlet/Outlet Diameter: 2.5? (center-in/center-out)
• Body Dimensions: 14? (L) × 9.5? (W) × 4? (H)
• Overall Length: 19?
• Material: T?304 stainless steel
• Shape: Oval
• Reversible: Yes
• Installation: Weld-in or 3? band clamp
• Sold: Individually