MBRP Armor Plus S4616409 2.5-Inch Stainless Steel Resonator Bypass for Audi A3 and Volkswagen GTI

RELIABILITY BACKED FOR A LIFETIME - ARMOR PLUS Series exhaust systems are crafted from corrosion-resistant T409 Stainless Steel - a value-oriented material designed to protect from penetrating rust and will stand up to almost anything you can throw at it. T409 Stainless Steel tubing is easy to clean. If you’re looking for a performance exhaust system with a Lifetime Warranty, this is probably the one for you. If you don’t find yourself faced with lots of precipitation and salt, this is all you’re ever going to need. All of the tubing is mandrel bent for maximum exhaust flow. Mandrel bending ensures no rippling in the bends. The end result is that it gives you more fresh air inside your engine’s cylinders, allowing it to produce more power and improve vehicle performance and longevity. It's important to note that T409 Stainless Steel is resistant to penetrating rust but winter conditions, heavy salt air, and road treatments might accelerate the corrosion process, these conditions are not covered by MBRP's manufacturer warranty unless the part or system fails completely. When it comes to a performance exhaust system, choose the MBRP ARMOR PLUS Series for a reliable option backed for a lifetime. MBRP, Stand out from the crowd with a performance exhaust system that sounds great. Armor Plus Resonator Bypass; 2.5 in.; 409 Stainless Steel; Only Fits w/65mm Tubing; Only Fits Exhaust with 65mm Tubing. Cutting Required for Installation.

• Rugged T409 Stainless Steel Construction. Smooth Mandrel Bent Tubing. Moderate Exhaust Tone. Up to 6% Flow Increase

Upgrade your vehicle’s exhaust flow with the MBRP Armor Plus S4616409 Resonator Bypass. Designed for exhaust systems using 65 mm tubing, this 2.5-inch bypass is constructed from corrosion-resistant T409 stainless steel for dependable performance and long-term durability. Its value-oriented stainless steel construction helps resist penetrating rust while providing a clean, purposeful appearance.

The MBRP S4616409 features smooth mandrel-bent tubing that helps maintain consistent internal airflow through the exhaust system. By preventing the restrictions commonly caused by rippled bends, the design can support improved exhaust flow, sharper engine response, and increased performance. The system produces a moderate exhaust tone and may provide up to a 6% flow increase, depending on the vehicle and supporting modifications.

This Armor Plus resonator bypass is intended for select 2015–2017 Audi A3 and Volkswagen GTI applications, including 2.0L turbocharged configurations. It fits exhaust systems with 65 mm tubing and requires cutting for installation. T409 stainless steel is resistant to penetrating rust, but exposure to heavy road salt, winter treatments, and salt air may accelerate surface corrosion; such conditions may be limited under the manufacturer’s warranty. The product carries MBRP’s Lifetime Warranty. This product is not CARB approved and may not be legal for use on vehicles operated on public roads in all areas. Check local emissions regulations and confirm vehicle fitment before installation.

Key Product Specifications & Technical Data

• Brand: MBRP
• Part Number: S4616409
• Series: Armor Plus
• Product Type: Resonator bypass
• Material: T409 stainless steel
• Tube Size: 2.5 inches
• Required Exhaust Tubing: 65 mm
• Installation: Cutting required

What's Included

One MBRP Armor Plus S4616409 stainless steel resonator bypass.

Fitment

Fits select 2015–2017 Audi A3 and Volkswagen GTI models with compatible 2.0L turbocharged exhaust systems and 65 mm tubing. Verify drivetrain, exhaust configuration, and application-specific fitment before ordering.

Features:

• T409 Stainless Steel Construction: Provides corrosion resistance and dependable durability for everyday performance use.
• Mandrel-Bent Tubing: Maintains smooth internal airflow by reducing restrictions through the bends.
• Improved Exhaust Flow: Supports enhanced engine breathing and may provide up to a 6% flow increase.
• Moderate Exhaust Tone: Delivers a controlled performance sound without an excessively aggressive exhaust note.

Fitments:
2015 Volkswagen GTI Autobahn
2015 Volkswagen GTI S
2015 Volkswagen GTI SE
2016 Volkswagen GTI Autobahn
2016 Volkswagen GTI S
2016 Volkswagen GTI SE
2017 Audi A3 Premium
2017 Audi A3 Premium Plus
2017 Audi A3 Prestige
2017 Volkswagen GTI Autobahn
2017 Volkswagen GTI S
2017 Volkswagen GTI SE
2017 Volkswagen GTI Sport
2018 Audi A3 Premium
2018 Audi A3 Premium Plus
2018 Audi A3 Prestige
2018 Volkswagen GTI Autobahn
2018 Volkswagen GTI S
2018 Volkswagen GTI SE
2019 Audi A3 Premium
2019 Audi A3 Premium Plus
2019 Audi A3 Prestige
2019 Audi A3 Titanium
2019 Volkswagen GTI Autobahn
2019 Volkswagen GTI Rabbit Edition
2019 Volkswagen GTI S
2019 Volkswagen GTI SE
2020 Audi A3 Premium
2020 Audi A3 Premium Plus
2020 Volkswagen GTI Autobahn
2020 Volkswagen GTI S
2020 Volkswagen GTI SE
2021 Volkswagen GTI Autobahn
2021 Volkswagen GTI S
2021 Volkswagen GTI SE
2022 Volkswagen GTI Autobahn
2022 Volkswagen GTI S
2022 Volkswagen GTI SE
2023 Volkswagen GTI 40th Anniversary Edition
2023 Volkswagen GTI Autobahn
2023 Volkswagen GTI S
2023 Volkswagen GTI SE
2024 Volkswagen GTI Autobahn
2024 Volkswagen GTI S
2024 Volkswagen GTI SE
2025 Volkswagen GTI Autobahn
2025 Volkswagen GTI S
2025 Volkswagen GTI SE
2026 Volkswagen GTI Autobahn
2026 Volkswagen GTI S
2026 Volkswagen GTI SE

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1