BLOX BXEX-51104-BK Muffler Delete Axle-Back Black for 2015-2021 Subaru WRX/STI

Vehicle Fitment

• 2015-2021 Subaru WRX (Sedan/Hatch, 2.0L FA20DIT Turbocharged, AWD) - Stock Midpipe Only
• 2015-2021 Subaru WRX STI (Sedan/Hatch, 2.5L EJ257 Turbocharged, AWD, Non-SPT) - Stock Midpipe Only

Fitment Notes

• Does NOT fit 2020-2021 WRX or STI equipped with the Sport Package (SPT) exhaust - SPT models use a 3-bolt exhaust flange incompatible with this kit
• Requires OEM stock midpipe - will not connect to aftermarket midpipe or cat-back exhaust systems
• Bolts directly to the factory 2-hole exhaust flange - no cutting or drilling required
• Not CARB legal - not for sale or use in California

Features

• Full dual muffler delete design with quad 3.5" black-coated exhaust tips for an aggressive rear appearance
• Constructed from T304 stainless steel for long-term corrosion resistance and durability
• Mandrel-bent tubing maintains consistent 3" inner diameter for unrestricted exhaust flow
• TIG-welded construction for clean, leak-free joints throughout
• Removes heavy OEM mufflers to reduce rear-end weight
• Direct bolt-on fitment - includes all new hardware and gaskets

Specifications

• Part Number: BXEX-51104-BK
• Exhaust Type: Axle-Back Muffler Delete
• Piping Diameter: 3"
• Tip Diameter: 3.5"
• Tip Finish: Matte Black Coated
• Tip Style: Single-Wall, Quad Exit
• Material: T304 Stainless Steel
• Construction: Mandrel-Bent, TIG-Welded
• Flange: 2-Hole OEM Bolt Pattern
• Weight: 15.5 lbs
• Position: Axle-Back (Rear)

Included Components

• 1x Dual-Exit Muffler Delete Assembly with Quad 3.5" Black Tips
• New hardware and gaskets for installation

Product Description

The BLOX Racing BXEX-51104-BK is a T304 stainless steel axle-back muffler delete kit built for 2015-2021 Subaru WRX and WRX STI (non-SPT). It replaces the factory axle-back section and its heavy OEM mufflers with a lightweight, free-flowing dual-exit assembly featuring quad 3.5" matte black-coated tips. The result is a more aggressive exhaust note, a cleaner rear valance look, and a reduction in rear-end weight - all without requiring a full cat-back system.

Built with mandrel-bent 3" piping and TIG-welded joints throughout, this kit bolts directly to the factory 2-hole exhaust flange using the included hardware and gaskets - no cutting, drilling, or modification required. Note that this kit requires the OEM stock midpipe and is not compatible with aftermarket exhaust systems. SPT-equipped 2020-2021 WRX and STI models use a 3-bolt flange and will not fit.