F1 Universal Valved Muffler Kit

Transform the sound of virtually any performance vehicle with the STRATEC™ F1 Universal Valved Muffler Kit, designed for enthusiasts who want a cleaner, more refined acoustic exhaust tone with full control over volume.

Rather than simply making the vehicle louder, the STRATEC™ F1 muffler is designed to improve the character of the exhaust note while allowing you to instantly switch between a quieter, refined sound and an aggressive straight-through performance tone.

Constructed from premium T304 stainless steel with precision TIG welds, this universal system can be integrated into a wide range of custom exhaust applications by a qualified exhaust or fabrication shop.

Two Exhaust Personalities

Valves Closed — Refined Acoustic Mode

When the valve is closed, exhaust gases are routed through the muffler's internal baffled chamber.

This helps:

• Reduce Overall Exhaust Volume
• Soften Harsh Exhaust Frequencies
• Create a More Refined Acoustic Tone
• Reduce Excessive Exhaust Harshness
• Improve Daily-Driving Comfort

Ideal for cruising, residential areas, highway driving, or whenever you want a more controlled exhaust sound.

Valves Open — F1 Performance Mode

Open the valve using the included remote and exhaust gases are directed through the freer-flowing bypass path.

The result is:

• Louder & More Aggressive Exhaust Sound
• Sharper Exhaust Tone
• Increased Exhaust Presence
• Freer-Flowing Exhaust Path
• Maximum Performance Character

Premium Features

• Premium T304 Stainless Steel Construction
• Vacuum-Operated Exhaust Valve
• Key-Fob Remote Control System
• Universal Performance Application
• Precision TIG-Welded Construction
• Acoustically Tuned Muffler Design
• Quiet & Performance Sound Modes
• Straight-Through Valve-Open Exhaust Path
• Professional Exhaust-Shop Installation
• Multiple Muffler Configurations Available
• Multiple Pipe Diameters Available

Available Muffler Styles

Choose the configuration that best suits your exhaust layout:

Single Inlet / Single Outlet

Traditional inline configuration for single-pipe exhaust applications.

Single Inlet / Dual Outlet

Ideal for converting one exhaust inlet into dual outlets.

T-Style

Designed for custom exhaust layouts requiring an alternate valve and bypass configuration.

Available Exhaust Pipe Sizes

• 2.5 Inch / 63 mm
• 3.0 Inch / 76 mm
• 3.5 Inch / 89 mm
• 4.0 Inch / 101 mm
• 5.0 Inch / 127 mm

Always measure the outside diameter of your existing exhaust tubing before ordering.

Muffler Quantity

Available as:

• 1 Muffler
• 2 Mufflers

Vehicles with true dual exhaust systems will typically require two mufflers depending on the desired installation layout.

Universal Fitment

The STRATEC™ F1 Valved Muffler is a universal performance component and can be adapted to many:

• Cars
• Sports Cars
• Supercars
• SUVs
• Trucks
• Turbocharged Applications
• Naturally Aspirated Applications
• Custom Performance Builds

Because this is a universal product, cutting, welding, fabrication, reducers, adapters, or additional piping may be required depending on the vehicle.

General Size Guidance

Typical applications may use:

• Cars: 2.5"
• Sports Cars: 2.5"–3.0"
• SUVs: 2.5"–3.0"
• Trucks / Larger Vehicles: 3.0"–3.5"+

These are general guidelines only. Exhaust diameter should ultimately be selected according to your vehicle's existing exhaust system, horsepower level, engine configuration, and fabrication requirements.

Package Includes

Depending on selected configuration:

• STRATEC™ F1 Valved Muffler
• Vacuum Exhaust Valve Assembly
• Vacuum Control Components
• Wireless Key-Fob Remote System
• Related Installation Hardware

Select 1 Muffler or 2 Mufflers according to your exhaust configuration.

Reversible Installation

When installed as a removable exhaust section and the original factory components are retained, the vehicle can generally be returned to its original exhaust configuration later.

We recommend having the system installed by a qualified exhaust or fabrication shop for the cleanest installation and easiest future reversal.