BLOX BXEX-51104 T304 Muffler Delete Axle-Back Exhaust for 15-21 Subaru WRX/STI

Vehicle Fitment

• 2015-2021 Subaru WRX / WRX STI -- All Trims (VA, 2.0L FA20DIT / 2.5L EJ257 Turbo, AWD)

Fitment Notes

• Axle-back muffler delete -- replaces factory mufflers only
• Fits WRX (FA20DIT 2.0T) and STI (EJ257 2.5T) on the VA chassis
• Bolts to factory 2-hole exhaust flange -- direct replacement
• Will not work with aftermarket midpipes using non-OEM flange patterns
• Uses OEM hanger locations -- no cutting or welding
• Includes new gaskets and hardware

Features

• T304 stainless steel construction -- mandrel-bent and TIG-welded
• Dual muffler delete design with quad single-wall polished tips
• 3" piping with 3.5" exhaust tips
• Eliminates heavy factory mufflers -- significant weight reduction
• Aggressive exhaust note -- loud cold starts, quiet cruise, throaty WOT
• Direct bolt-on to factory 2-hole flange
• ISO 9001 certified manufacturing

Specifications

• Type: Axle-back muffler delete kit
• Piping Diameter: 3"
• Tip Size: 3.5"
• Tip Style: Single-wall, quad, polished stainless
• Exit Style: Dual rear exit, quad tip
• Material: T304 stainless steel
• Construction: Mandrel-bent, TIG-welded
• Flange: 2-hole bolt-on (OEM pattern)
• Finish: Polished stainless steel
• Warranty: BLOX Racing limited warranty

Included Components

• 1x Driver-side muffler delete pipe with dual tips
• 1x Passenger-side muffler delete pipe with dual tips
• 1x Gasket and hardware kit

Product Description

The BLOX Racing BXEX-51104 is a T304 stainless steel axle-back muffler delete kit designed for the 2015-2021 Subaru WRX and WRX STI on the VA chassis. This dual-exit system replaces the heavy factory mufflers with mandrel-bent, TIG-welded delete pipes that terminate in four single-wall 3.5-inch polished stainless tips. The result is a significant reduction in weight and a noticeably more aggressive exhaust note -- loud on cold start, throaty under wide-open throttle, and relatively composed during highway cruising.

Each delete pipe features 3-inch T304 stainless steel tubing that bolts directly to the factory 2-hole exhaust flange and hangs from the OEM hanger locations with no cutting, welding, or modification required. The kit includes fresh gaskets and all necessary hardware for a straightforward installation. BLOX Racing's manufacturing meets or exceeds ISO 9001 certification standards, ensuring consistent weld quality and fitment across units.

This kit fits both the WRX with the 2.0-liter FA20DIT turbo and the STI with the 2.5-liter EJ257 turbo, but is not compatible with STI models equipped with the Subaru Performance Tuning exhaust package or any 2022+ VB-chassis WRX. For owners looking for an affordable entry point into the aftermarket exhaust world with a bold look and sound, the BLOX Racing muffler delete delivers strong value. A black-tip variant is also available under part number BXEX-51104-BK.