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My '78 bronco had the original muffler, and a tailpipe with some sort of spark arrester in it. Muffler was cracked in a few spots and the spark arrester created massive restriction. Would not exceed 55 mph under any circumstance with that setup. Standard tailpipe and a flowmaster made a big difference.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
