Exhaust Kit for Ford F-150 (2011-2014) 3.5L 5.0L

High-Flow Dual Muffler-Back Exhaust Kit for 2011-2014 Ford F-150 (P415)

What it Does: The dual muffler-back exhaust kit replaces the restrictive factory muffler and single tailpipe on the 2011-2014 Ford F-150 to reduce exhaust backpressure, improve scavenging, and deliver an aggressive rear-exit exhaust note.

The Stock Ford F-150 Exhaust Restriction

The OEM exhaust system on the P415 platform relies on a heavily baffled, high-volume muffler and restrictive press-bent tailpipe routing. Under sustained towing or wide-open throttle, this bottleneck traps thermal energy and restricts exhaust gas velocity out of the 3.5L EcoBoost turbochargers and the high-revving 5.0L Coyote cylinder heads. Additionally, factory crush bends narrow the effective internal diameter, causing turbulent backpressure that limits mid-range volumetric efficiency.

The Engineering Solution

This builder-oriented system replaces the stock rear assembly with a high-flow 2-chamber Flowsound muffler featuring a 3-inch inlet and dual 2.5-inch outlets. Fabricated from durable aluminized steel, the dual 2.5-inch tailpipes are mandrel-bent to preserve a uniform cross-sectional area, reducing gas friction and optimizing post-combustion velocity. The tailpipes route symmetrically beneath the frame rails, engineered specifically to maintain clearance around the OEM spare tire and factory receiver hitch across all wheelbase configurations.

What's Included

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

Technical Specifications

Compatibility

• 2011-2014 Ford F-150 3.5L V6 EcoBoost (Gasoline, factory single-inlet muffler only)
• 2011-2014 Ford F-150 5.0L V8 Coyote (Gasoline & Flex-Fuel, factory single-inlet muffler only)
• Compatible with all standard cab, SuperCab, and SuperCrew wheelbase configurations

Frequently Asked Questions & Fitment Warnings

Does this fit the P415 F-150?

Yes, this fits the 2011-2014 Ford F-150 equipped with the 3.5L EcoBoost or 5.0L Coyote engine. This kit only fits models that left the factory with a single-inlet muffler; it does not fit models with dual-inlet mufflers, naturally aspirated 3.7L V6, or 6.2L V8 models.

Is this kit a direct bolt-on installation?

No, this is a custom-fit builder kit requiring an experienced installer to adapt, cut, or fabricate connecting piping, as nothing forward of the muffler is included and exhaust tips are not provided.

The Ford Towing Standard

Built for the structural demands of heavy towing and high payload duty cycles, this system maintains rigid hanger points and high-clearance tailpipe profiles that withstand rugged washboard trails, axle articulation, and sustained thermal stress without contacting the chassis or suspension components.