MBRP S7278409 Armor Plus Race Cat-Back Exhaust 2015-2017 Ford Mustang GT Coupe

Vehicle Fitment

• 2015-2017 Ford Mustang GT Coupe (5.0L Coyote V8; All Transmission Types)

Fitment Notes

• 5.0L Coyote V8 engine only - does not fit the EcoBoost 4-cylinder, V6, or Shelby GT350/GT500 variants in the 2015-2017 Mustang lineup
• Coupe body style only - Convertible models are not supported and require a different part number
• This is the Race version - mufflers are included but tuned for maximum aggression and volume; buyers who prefer a more street-friendly tone should consider the S7277409 Street version instead
• An H-pipe (resonator delete) is included in the kit - the factory resonator is replaced with this H-pipe as part of the installation, contributing to the old-school muscle car exhaust character
• T409 stainless steel may develop surface rust over time, particularly under wintry road conditions or heavy road salt exposure - surface rust is not covered under warranty

Features

• Race Profile sound tuning delivers MBRP's most aggressive muffled cat-back exhaust note for the S550 Mustang GT - loud, head-turning, and race-inspired, with the character of an old-school muscle car that wakes up dramatically under throttle
• Resonator delete H-pipe is included and replaces the factory resonator, working in combination with the Race Profile mufflers to produce the deep, rowdy V8 exhaust character the Coyote engine is capable of but the factory exhaust suppresses
• Full cat-back design replaces all factory exhaust from the catalytic converter rearward for the maximum flow improvement available in a complete bolt-on package
• Dual rear exit routes both tips through the factory rear bumper valence cutouts simultaneously, delivering a symmetrical, performance-oriented rear appearance with both large tips on full display
• 16-gauge T409 stainless steel construction throughout - the Armor Plus series delivers strong corrosion resistance and a lifetime warranty at a value price point relative to T304 systems
• Mandrel-bent 3-inch tubing maintains a consistent internal diameter through all bends, maximizing exhaust velocity and reducing backpressure versus the factory system
• Two mirror-polished T304 stainless steel dual-wall angle-cut tips (4.5-inch OD) cap both exits - the dual-wall construction shields surrounding body panels from exhaust heat while the large diameter and polished finish make an immediate visual impact
• Welded-on hanger brackets align directly with factory OEM mounting points for a secure, rattle-free installation
• Bolt-on installation requires no welding, cutting, or drilling - all necessary hardware included
• Backed by MBRP's Lifetime Warranty under the Armor Plus series designation

Specifications

• Part Number: S7278409
• Exhaust Type: Cat-Back
• Series: Armor Plus
• Sound Profile: Race Profile
• Exit Style: Dual Rear Exit
• Tubing Diameter: 3 inches
• Body Material: 16-gauge T409 Stainless Steel
• Tip Style: Dual Wall, Angle Cut
• Tip Outlet Diameter: 4.5 inches OD
• Tip Material: Mirror-polished T304 Stainless Steel
• Tip Quantity: 2 (one per side)
• H-Pipe: Included (resonator delete)
• Mufflers: Included (Race Profile)
• Hanger Style: Welded-on
• Platform: 2015-2017 Ford Mustang S550 (6th generation)
• Position: Cat-back (replaces all exhaust from catalytic converter outlet rearward)
• Warranty: Lifetime (Armor Plus)

Included Components

• 1x H-pipe assembly (T409 stainless steel, resonator delete, 3-inch tubing)
• 2x Race Profile mufflers (one per side, T409 stainless steel)
• 2x Tailpipes with over-axle routing (T409 stainless steel, mandrel-bent 3-inch tubing)
• 2x Mirror-polished T304 stainless steel dual-wall angle-cut tips (4.5-inch OD)
• 1x Hardware and installation kit (clamps and mounting hardware)
• 1x MBRP installation instructions

Product Description

The MBRP S7278409 is a 3-inch Armor Plus dual rear exit cat-back exhaust system engineered for the 2015-2017 Ford Mustang GT Coupe equipped with the 5.0L Coyote V8 engine. It is the Race version counterpart to the S7277409 Street version - sharing the same platform fitment, material spec, H-pipe, routing geometry, and Lifetime Warranty, but using Race Profile mufflers tuned for maximum volume and aggression rather than the Street version's more controlled, daily-friendly tuning. Both versions include the resonator delete H-pipe that contributes the deep, old-school muscle car character - but where the Street version tempers that sound with street-oriented mufflers, the Race version amplifies it with race-tuned mufflers that bring out the full throaty roar the 5.0L Coyote is capable of.

The full cat-back routing replaces all factory exhaust from the catalytic converter rearward. Both exits route through the factory rear bumper valence cutouts simultaneously via the dual rear exit layout, each capped with a mirror-polished T304 stainless steel 4.5-inch dual-wall angle-cut tip. The dual-wall tip construction provides heat shielding for surrounding body panels while the large diameter and polished finish make a decisive visual statement. The 16-gauge T409 stainless steel body and welded-on hanger brackets are built to MBRP's Armor Plus standard, backed by a Lifetime Warranty. T409 stainless steel may develop surface rust under heavy salt or winter conditions - owners in those environments may prefer the T304 Armor Pro variant.

Fitment is restricted to the Coupe body style only - Convertible Mustang GTs require a different part number. The system is compatible with the 5.0L Coyote V8 only and does not fit EcoBoost, V6, or Shelby variants. Buyers deciding between the S7277409 and S7278409 should be clear on the sound difference: the Street version is aggressive but daily-drivable with no highway drone; the Race version is louder, more demanding, and best suited for owners who prioritize maximum exhaust character and are comfortable with the additional volume on everyday drives. Installation is a complete bolt-on process, and all hardware is included. The S7278409 is backed by MBRP's Lifetime Warranty under the Armor Plus designation.