Why Your Truck Drones on the Highway, and How to Fix It Without Losing the Sound
A lot of people come to us with the same story. They put a louder exhaust on their truck or car, loved how it sounded around town, and then took it out on I-65. Somewhere around 65 miles an hour, a low, steady hum filled the cab and never let up. After twenty minutes it felt like it was humming inside their head.
That hum has a name, and it's called drone. It happens when the sound coming out of your exhaust hits a certain pitch at the engine speed you cruise at. The cab of the vehicle picks up that pitch and makes it louder, a little like blowing across the top of a bottle. Trucks and cars with fewer cylinders running in fuel-saving mode are especially prone to it.
The good news is that drone is usually fixable, and you don't have to go back to a quiet stock system to get rid of it. Often the answer is adding a resonator, which is a small chamber designed to cancel out that one annoying pitch while leaving the rest of the sound alone. Other times it's about changing the muffler style, the pipe length or where the exhaust exits the vehicle.
This is where an exhaust shop that bends its own pipe makes a real difference. A boxed kit is built to fit thousands of vehicles the same way. When we build or adjust a system here, we can change the length, add a chamber or move a section to tune out the drone for your specific vehicle.
If you're not sure what you want yet, tell us how you drive. Someone who commutes up and down Mack Hatcher Parkway every day needs something different than someone who takes the truck out on weekends. We'll talk through what you'll hear at idle, around town and on the highway before anything gets cut or welded.
If your exhaust sounds great until you hit the interstate, bring it by and let us take a listen. Call Quick Muffler at (615) 790-2385 or stop by 121 7th Ave S in downtown Franklin, Monday through Friday from 7 to 5.
