2021+ F150 MRT Deep & Mellow Cat Back

Be a Beast with the Right Exhaust System

Every MRT Deep & Mellow Cat Back Exhaust is handcrafted from T304 stainless steel right here in the U.S. This system includes 3" mandrel bent tubing, dual 4" double wall, and polished T304 stainless steel tips with beveled edges. Interested in a unique, matte black ceramic coating? Choose a custom, choose the "Black Ops" option and stand out. From increased exhaust flow from the straight through design and smooth bends, you will feel the increase in horse power. This system is engineered for the best sound to match your vehicle.

The Deep & Mellow Cat Back is quieter than the MRT Tough Truck Cat Back with DMS, but louder than your stock Raptor. It has just enough exhaust presence with elevated sound to Get Noticed, plenty of opportunity to Feel the Performance and is packaged in a design without excessive drone. DIY backyard installation takes about 90 minutes using standard hand tools - you don't even need a tuning. We inspect each system a minimum of four times to ensure quality and back them with a limited lifetime warranty.

How does it sound? The MRT Deep & Mellow Catback #91K105 for the F150 provides a refined on-demand sound that is loud when you want it.
Is there drone or resonance? Minimal drone.
What if I step on it? Wide-open throttle delivers a spirited and fun performance sound.

• DIY installation for the backyard mechanic
• T304 Stainless Steel for the best corrosion resistance
• Engineered, designed and manufactured in the USA

• What kind of steel is it made from? Corrosion-resistant T304 stainless steel.
• Where is it made? Developed and handcrafted in-house at MRT facility in Plymouth, Michigan, USA.
• How long is the Warranty? Limited Lifetime Warranty (See Warranty Page for Details)

• What is the muffler design? Straight through design to provide maximum exhaust gas flow.
• What is the tube diameter? A large 3" tube is used for reduced exhaust flow restrictions.
• What are the performance gains? Reducing restriction and maximizing flow provides for noticeable gains.

• What kind of tip is it? Dual 4" double wall, polished T304 stainless steel tips with beveled edges. .
• What are my tip finish options? Stylish Polished Stainless Steel or Black Ops Matte Ceramic.
• How do I get noticed? Great sound and great looks turn heads and get positive comments!

• Can I install this myself? Yes, MRT engineers this Premium Exhaust System for a simple do-it-yourself (DIY) installation.
• How long does it take to install? Installation time is about 1.5 hours and requires only common hand tools.
• What is included? All necessary hardware included.