Exhaust Kit for Ford F-150 (1987-1996) 5.0L 5.8L

High-Flow Dual Muffler-Back Exhaust Kit for 1987-1996 Ford F-150 (OBS)

What it Does: The dual muffler-back exhaust kit replaces the restrictive factory muffler and single tailpipe on 1987-1996 Ford F-150 trucks to reduce exhaust backpressure, optimize scavenging, and deliver an aggressive exhaust tone.

The Stock Ford F-150 Exhaust Restriction

Factory exhaust configurations on the OBS (8th and 9th Generation) F-150 rely on restrictive, chambered OEM mufflers paired with crush-bent tailpipes. These diameter-pinched sections impede the exhaust velocity of the Windsor 5.0L (302 ci) and 5.8L (351W) V8 platforms, elevating thermal load at the exhaust ports and causing excessive parasitic pumping losses under heavy load or towing conditions.

The Engineering Solution

This system replaces the post-catalytic section with a high-flow Flowsound two-chamber performance muffler featuring a 3.0-inch single inlet transitioning to dual 2.5-inch outlets. Paired with 2.5-inch mandrel-bent aluminized steel tailpipes, it maintains continuous pipe cross-section geometry around axle drop points. The layout exits straight back under the rear bumper parallel to the frame rails, providing engineered clearance for the factory receiver hitch and OEM-sized underbody spare tire mount.

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

• 1987-1996 Ford F-150 5.0L V8 Gasoline (Factory single-inlet muffler only)
• 1987-1996 Ford F-150 5.8L V8 Gasoline (Factory single-inlet muffler only)
• Fits all cab and wheelbase configurations (Regular Cab, SuperCab, Short/Long Bed)

Frequently Asked Questions & Fitment Warnings

Does this fit the OBS F-150?

Yes, this fits the 1987-1996 Ford F-150 equipped with Windsor 5.0L or 5.8L engines, provided the truck left the factory with a single-inlet muffler; it does not fit models with factory dual-inlet mufflers or inline-6 engines without custom mid-pipe fabrication.

Is this a direct bolt-on kit?

No, this is a custom installer kit that excludes components forward of the muffler and exhaust tips, meaning pipe trimming and fabrication may be required depending on your wheelbase and existing intermediate pipe condition.

The Ford Truck Standard

Built for the demands of utility and towing, this aluminized steel dual exhaust configuration ensures low exhaust gas temperatures and consistent structural rigidity under heavy hauling duty cycles.