Ford Volant Exhaust Systems for the F150 at Lower Prices. Volant Designs the right bends, and has outstanding research and development on the muffler design, from the amount of back pressure to the smooth exit have made the Volant Ford exhaust a great combo with a Volant Intake. Volant dynos all exhaust systems with Volant intakes or with the stock OE equipment not with other aftermarket systems. Volant's 4 inch exhaust system is made from stainless steel with mandrel bends for the best flow possible. So if you already have an intake the Volant exhaust is your exhaust of choice.