Exhaust Kit for Ford F-150 (2011-2013) 3.7L

High-Flow Dual Muffler-Back Exhaust Kit for 2011-2013 Ford F-150 (P415)

What it Does: The dual muffler-back exhaust kit replaces the restrictive factory single-exit exhaust on the 2011-2013 F-150 to reduce post-catalytic backpressure and improve scavenging across the RPM band.

The Stock Ford F-150 Exhaust Restriction

The OEM exhaust system on the 12th-generation P415 platform routes gases through a heavy, baffled chambered muffler and narrow-diameter, crush-bent tubing. For the high-revving Duratec 37 (Cyclone V6), this creates substantial exhaust backpressure at mid-to-high RPMs, trapping thermal energy near the rear axle assembly and limiting the engine's natural volumetric efficiency during heavy payload or towing demands.

The Engineering Solution

This dual muffler-back system integrates a high-flow Flowsound two-chamber muffler featuring a single 3-inch inlet split into dual 2.5-inch outlets. The system utilizes mandrel-bent 2.5-inch aluminized steel tailpipes that maintain consistent cross-sectional area throughout every radius, preventing laminar flow detachment. The pipes are routed parallel with the outside frame rails to clear OEM receiver hitches and factory-sized spare tire assemblies across all wheelbase configurations, optimizing gas velocity while providing durable corrosion resistance.

What's Included

• 1 Flowsound 2-chamber muffler (single 3" inlet, dual 2.5" outlets)
• 2 aluminized mandrel-bent two-piece 2.5" tail pipes (slip-together)
• 8 muffler clamps
• 1 larger exhaust clamp
• 4 rubber-insulated hangers

Technical Specifications

Compatibility

• 2011-2013 Ford F-150 3.7L V6 Gasoline (Factory single-inlet muffler configurations)
• 2011-2013 Ford F-150 3.7L V6 Flex-Fuel (Factory single-inlet muffler configurations)
• Fits all cab sizes and bed lengths (all wheelbases)

Frequently Asked Questions & Fitment Warnings

Does this fit the P415 F-150?

Yes, this fits the 2011-2013 Ford F-150 equipped with the Cyclone 3.7L engine. Does not fit dual-inlet factory muffler setups, 3.5L EcoBoost, 5.0L Coyote, or 6.2L V8 configurations, nor does it include components forward of the muffler.

Is this a direct bolt-on installation?

No, this is a custom-fit builder kit requiring an experienced installer; intermediate pipe fabrication or hanger modification may be required based on wheelbase variations and aftermarket suspension clearances.

The Ford Workhorse Standard

Engineered for the demands of the working truck, this aluminized setup withstands the thermal cycling and mechanical vibration encountered during rigorous hauling and high-tongue-weight towing.