Exhaust Kit for Ford F-150 (1987-1989) 3.8L

High-Flow Dual Muffler-Back Exhaust Kit for 1987-1989 Ford F-150 (Bricknose)

What it Does: The Dual Muffler-Back Exhaust Kit replaces the restrictive factory rear exhaust and baffled muffler on the 1987-1989 Ford F-150 to decrease exhaust backpressure, improve scavenging, and increase exhaust gas velocity.

The Stock Ford F-150 Exhaust Restriction

Factory exhaust routing on the eighth-generation Bricknose platform relies on narrow, crush-bent tubing and an excessively baffled OEM muffler that introduces severe backpressure into the 3.8L Essex V6. Crush bends cause internal diameter deformation, creating turbulent boundary layer separation and thermal retention under sustained load. Over decades of service, road spray and condensation collect in factory mild steel seams, causing rust-through, hanger failure, and compromised exhaust velocity that hurts low-end torque during towing.

The Engineering Solution

This system utilizes a high-flow Flowsound two-chamber muffler featuring a single 3.0-inch inlet and dual 2.5-inch outlets to divide exhaust volume evenly. Paired with 2.5-inch mandrel-bent aluminized steel tailpipes, the layout maintains a uniform cross-sectional diameter through every bend radius to maximize volumetric efficiency. Tailpipes exit cleanly under the rear valence parallel to the frame rails, engineered specifically to clear factory-size spare tires and OEM receiver hitches across all wheelbase configurations.

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

• 1987-1989 Ford F-150 3.8L V6 (Gasoline & Flex-Fuel engines with factory single-inlet muffler configurations across all wheelbases)

Frequently Asked Questions & Fitment Warnings

Does this fit the Bricknose F-150?

Yes, this is a direct fit for the 1987-1989 Ford F-150 equipped with the 3.8L Essex V6 engine. Does not fit models with factory dual-inlet mufflers, V8 applications, or vehicles modified with oversized aftermarket suspension/tire setups that intrude on factory hanger clearance.

Is this a bolt-on kit?

No, this is not a direct bolt-on system; an experienced installer may need to fabricate intermediate pipe sections forward of the muffler depending on cab length and bed wheelbase.

The Ford Caliber

Built to handle heavy bed payloads and sustained hauling cycles, this aluminized steel configuration resists thermal fatigue, reduces structural vibration, and ensures durable exhaust gas evacuation under continuous truck duty.