MBRP S5219304 Armor Pro Cat-Back Exhaust 3" Dual Pre-Axle (Polished Tips) | 2021-2026 Ford F-150

Overview

The MBRP S5219304 Armor Pro Cat-Back Exhaust is the pinnacle of performance exhaust engineering for the 2021–2026 Ford F-150. Built from aircraft-grade T304 stainless steel and dyno-proven for maximum flow, this Street Profile system replaces the restrictive factory exhaust with a deep, aggressive tone and up to 32% improved exhaust flow — making it one of the best cat-back exhausts for the 2021 Ford F-150 5.0L, 3.5L EcoBoost, and 2.7L EcoBoost. Whether you're daily driving or hitting the track, the Armor Pro delivers a premium sound and lasting durability that lesser systems simply cannot match.

Key Features & Benefits

• T304 Stainless Steel Construction — The highest chromium and nickel content of any exhaust alloy; completely rust-proof and engineered to withstand harsh winters, road salt, and off-road abuse. Backed by MBRP's Lifetime Warranty.
• 3-Inch Mandrel-Bent Tubing — Smooth, continuous bends eliminate restriction kinks and maximize exhaust flow, delivering up to 32% greater flow over the factory system for improved throttle response and performance.
• Street Profile Sound Tuning — Purpose-tuned for the perfect balance: an aggressive, deep exhaust note under acceleration that remains refined and non-intrusive at highway cruise. No obnoxious drone. Daily driveable.
• Dual Pre-Axle Exit Routing — Dual passenger-side pre-axle exit keeps tips tucked for a clean, factory-integrated look while delivering that unmistakable side-exit style and sound.
• Dual-Wall, Angle-Cut 4-Inch T304 Tips — Mirror-polished dual-wall stainless tips with MBRP stamped logo present a premium appearance and create a heat barrier to protect surrounding body panels.
• Dyno-Proven Performance — Every system undergoes extensive testing on MBRP's in-house Mustang 1100 AWD-SE Chassis Dynamometer and real-world road validation to ensure maximum gains for your specific engine.
• Bolt-On Installation — Utilizes factory OEM hanger locations with no cutting, welding, or custom fabrication required. Most owners complete the install in 1–2.5 hours with basic hand tools.
• Lower Exhaust Gas Temperatures (EGTs) — Improved exhaust scavenging reduces heat soak and helps your engine run cooler under load — especially beneficial for towing and performance driving.
• CARB Compliant — This system meets California Air Resources Board (CARB) emissions standards, making it legal for use in all 50 states.
• Synergy with Other Mods — MBRP's cat-back is the ideal foundation for additional performance upgrades, pairing perfectly with cold air intakes, programmers, and ECU tunes for cumulative power gains.

What's Included

• Complete cat-back exhaust system — all mid-pipes, resonator, and muffler sections
• (2) Dual-wall, angle-cut 4-inch OD T304 mirror-polished stainless steel tips with MBRP stamped logo
• All factory-style OEM replacement hangers (welded-on)
• All required hardware and clamps for bolt-on installation
• MBRP installation instructions

Specifications

Manufacturer Part #	S5219304
UPC	882963129666
Series	Armor Pro
Sound Profile	Street Profile
System Type	Cat-Back
Main Tubing Diameter	3 Inch
Tip Inlet Diameter	2.5 Inch
Tip Outlet Diameter	4 Inch OD (Dual Wall, Angle Cut)
Exit Configuration	Dual Pre-Axle, Passenger-Side Exit
Material	T304 Stainless Steel
Tip Finish	Mirror-Polished with MBRP Logo Stamp
Flow Improvement	Up to 32% over stock
Hanger Style	Welded-On, OEM Location
Warranty	Lifetime (Armor Pro / T304 SS)
CARB Compliant	Yes — 50-State Legal
Dyno Tested	Yes — Mustang 1100 AWD-SE Chassis Dyno

Fitment & Compatibility

This exhaust is specifically designed for 2021–2024 Ford F-150 equipped with the 2.7L EcoBoost V6, 3.5L EcoBoost V6, or 5.0L Coyote V8 engines across SuperCab and SuperCrew body styles with standard and 5.5-foot/6.5-foot beds.

⚠️ Exclusions — This system does NOT fit:

• F-150 PowerBoost Hybrid models
• F-150 models equipped with factory Power Running Boards
• Regular Cab Short Box (Regular Cab 5.5-foot bed) configurations
• F-150 Raptor or Tremor models

Cross-Reference OEM: Replaces stock factory cat-back exhaust system on applicable 14th-generation (Gen 14) 2021+ Ford F-150 platforms.

Frequently Asked Questions

Is this exhaust CARB compliant and legal in all 50 states? Yes. The MBRP S5219304 is CARB compliant and fully street-legal in all 50 states including California.

Will this exhaust drone at highway speeds? The Street Profile tuning with integrated resonator is specifically designed to deliver a deep, aggressive note under throttle while remaining refined at highway cruise speeds. Steeda notes this system is daily driveable and does not introduce drone.

Can I install this myself? Yes. This is a bolt-on system using factory OEM hanger locations with no cutting or welding required. Owners report typical DIY install times of 1 to 2.5 hours with basic hand tools and access to a lift or jack stands.

What warranty does the MBRP Armor Pro carry? The Armor Pro series backed by T304 stainless steel construction carries MBRP's Lifetime Warranty against defects in materials and workmanship for the original purchaser.

Installation

The MBRP S5219304 is a direct bolt-on replacement using all factory OEM hanger locations — no cutting, welding, or custom fabrication required. The system is designed with minimal bend angles and vehicle-specific pipe routing for a precise, rattle-free fit. Recommended tools: basic socket set, wrench set, penetrating oil for factory hardware. A vehicle lift or sturdy jack stands are strongly recommended for safety and ease of access. Typical DIY installation time is 1–2.5 hours. Light-to-moderate mechanical experience is sufficient for most owners. Professional installation is also an option for those who prefer it.