MBRP S5209BLK Armor BLK 4-Inch Race Cat-Back Exhaust | 2021-2026 Ford F-150 2.7L/3.5L/5.0L

Overview

The MBRP Armor BLK 4-Inch Race Cat-Back Exhaust System (S5209BLK) is engineered for 2021–2026 Ford F-150 owners who demand an aggressive, track-inspired exhaust note with a head-turning blacked-out aesthetic. Replacing your truck's factory cat-back system and resonator with a fully mandrel-bent, high-heat black-coated aluminized steel construction, this Race Profile system delivers maximum exhaust flow, improved engine performance, and an unmistakably deep, powerful sound — all in a bolt-on package. If you're looking for the best black cat-back exhaust for your 2021–2026 Ford F-150 2.7L EcoBoost, 3.5L EcoBoost, or 5.0L V8, MBRP's Armor BLK series is purpose-built for you.

Key Features & Benefits

• Race Profile Sound — The specially tuned Race muffler deletes the factory resonator and produces a deep, aggressive, chest-thumping exhaust note under acceleration, giving your F-150 the sound it should have come with from the factory. Rated "Very Aggressive" on the 5.0L V8.
• 4-Inch Mandrel-Bent Tubing — All tubing is mandrel bent to ensure zero rippling through bends, enabling smooth, unrestricted exhaust gas flow for improved horsepower, torque, and lower exhaust temperatures.
• Armor BLK High-Heat Black Powder Coat Finish — The tailpipes and tip are coated in a specialized high-heat black powder-coating engineered specifically for exhaust applications, providing a stealthy, aggressive look that's built to last.
• Black-Coated T304 Stainless Steel Tip — Includes a matching 5-Inch OD, single-wall, rolled angle-cut tip crafted from T304 stainless steel with a black powder-coat finish — a premium touch that complements any F-150 color or build theme.
• Fully Sealed Seams — Seams are fully sealed throughout the system for enhanced rust resistance and long-term durability.
• Welded Hangers — Hangers are welded directly to the system for a solid, rattle-free installation that holds up to demanding use.
• Bolt-On Installation — Designed as a direct bolt-on replacement for the factory F-150 cat-back system. All hardware and detailed instructions are included. Minor trimming may be required on certain cab/bed configurations.
• Maximized Engine Performance — High-flow design minimizes exhaust backpressure and reduces exhaust temperatures, contributing to greater fuel efficiency, torque, and horsepower gains.
• CARB Compliant — This product is CARB (California Air Resources Board) compliant, making it legal for use in all 50 U.S. states.

What's Included

• 4-Inch mandrel-bent black-coated aluminized steel cat-back exhaust system
• Race Profile muffler (resonator delete design)
• 5-Inch OD black-coated T304 stainless steel single-wall rolled angle-cut tip
• Welded hanger brackets
• All necessary installation hardware (clamps, bolts, washers)
• Detailed MBRP installation instructions

Specifications

Manufacturer Part #	S5209BLK
UPC	882963129505
Series	Armor BLK
System Type	Cat-Back
Profile	Race (Aggressive)
Tubing Diameter	4 Inch
System Material	Black-Coated Aluminized Steel
Tip Material	Black-Coated T304 Stainless Steel
Tip Style	Single Wall, Rolled Angle Cut
Tip Outlet Diameter	5 Inch OD
Exit Style	Single Side Exit (Passenger Side)
Finish	High-Heat Black Powder Coat
Coating Warranty	1 Year
Parts Warranty	3 Years
CARB Compliant	Yes
Sound Level	Very Aggressive (especially on 5.0L V8)

Fitment & Compatibility

Fits: 2021–2025 Ford F-150 — 2.7L EcoBoost V6 | 3.5L EcoBoost V6 | 5.0L Coyote V8 (Gasoline)

Does NOT fit: PowerBoost hybrid models | Raptor | Long Bed Crew Cab configurations

Wheelbase Note: Compatible with all F-150 wheelbase sizes; minor trimming of the front pipe may be required on certain cab and bed combinations. Confirm your specific cab/bed/engine configuration before ordering.

Is this exhaust CARB compliant? Yes — the MBRP S5209BLK is CARB compliant and legal for use in all 50 U.S. states, including California.

Will this fit a PowerBoost F-150? No — this system is not compatible with the F-150 PowerBoost hybrid drivetrain. A separate system is required for PowerBoost models.

Installation

The MBRP S5209BLK is designed as a bolt-on cat-back replacement requiring light-to-moderate mechanical skill — no welding required for most configurations. The system connects directly behind the factory catalytic converters, replacing everything from that point back including the factory resonator and muffler. All necessary hardware and step-by-step instructions are included in the kit. On certain cab/bed combinations, minor cutting of the front pipe section may be required to achieve proper fit. A vehicle lift or jack stands, basic hand tools, and penetrating oil for stock exhaust hardware are recommended. Professional installation is available through any MBRP authorized dealer.