The World's Most Trusted Name in Exhaust Baffles

Welcome to Big City Thunder!

Home of the Big City Thunder Monster Baffles

Don't be baffled about sound and power, Big City Thunder delivers both!!

• If you are looking for a more aggressive, throaty sound we can help, with our Original Thunder Monster baffles.
• If you are trying to tone things down, but not kill the sound we have you covered with our QQ Thunder Monster baffles.
• If you have a flat spot or hesitation with your carbureted bike we have an answer.
• If you have decel popping on your fuel injected bike we can help.

We not only produce baffles that sound great they also improve your overall performance.

Original Thunder Monster Baffles: These baffles are designed to turn all the horsepower and torque loose while delivering that deeper, throatier tone. You can feel the increased performance of the Thunder Monster baffles.

If you want more of a hot rod sound, check out our Original Thunder Monster exhaust baffles that fit most Vance & Hines, Cobra, Samson, Rinehart, Rush, Screamin' Eagle 16 Gauge, fishtails as well as many others.

QQ Thunder Monster Baffles: Looking for the performance that a motorcycle baffle can give you but want to tone it down a bit with an even deeper exhaust note? Our QQ Thunder Monster Baffles will do the job! Available for most Vance & Hines, Cobra, Samson, Rinehart, Rush, Screamin' Eagle 16 gauge, Fishtails, and more.

If you have stock or large diameter aftermarket mufflers or have removed or modified your stock or after market baffles and are not pleased with the results or sound, our Head Pipe Installation is the ticket! 

Thunder Monster Baffles for Screamin' Eagle II mufflers?  No problem, we have you covered. Our TMSEII Baffles are specific to the '06 and earlier Screamin' Eagle II Mufflers for Softails, Dynas, and Sportsters.

Screamin' Eagle Street Performance Slip On Mufflers for 2007 and up Baggers, Dynas, and Sportsters. We can make your Eagles soar with our patented Thunder Monster Baffles. The Screamin' Eagle baffles deliver a head turnin' hot rod note to the exhaust . The Screamin' Eagle Baffles are easy to install.

Curved or Radius Pipes: We produce baffles for most radius or curved pipes, including Vance & Hines Big Radius 2 into 2, Cobra Swept, Victory Swept, Ness, Hooker Troublemakers, and more.