COVID-19 UPDATE: Starting March 30th we will begin shipping orders once a week for IN STOCK items only. We have set up an automated phone service that will allow you to speak with a sales representative during this time, if needed. We thank all of our customers for working with us during this time and look forward to returning to full production in the coming weeks.

Big City Thunder Research & Development

Join the BCT R&D team!

Here’s what we need from you. We are constantly developing new parts. And although we have people that work here and ride, or have friends that ride, we still have new parts that need to be tested that we don’t have bikes for. That’s where you come in.

We need LOCAL bikes that we can measure, install new parts on, possibly remove for analysis, and then get you a final single or set of baffles for your bike at no charge.

At the moment, we are building prototype baffles for the following universal sizes:

- 1.350” I.D. muffler or headpipe (Depending on mounting location) This is a size used on some

  2018-newer Harley Davidson Softails.

- 1.500” I.D. muffler or headpipe (Depending on mounting location)

- 2.250” I.D. muffler or headpipe (Depending on mounting location)

- 2.500” I.D. muffler or headpipe (Depending on mounting location)

*These sizes represent the Inside diameter of either the muffler or head pipe that it will be installed in. We are working with our standard Thunder Monster baffle design, and our quiet ones too.  

Here is some of what we need to be able to give a fair analysis of the product:

-Bike in good working order. Nothing with deterioration of the exhaust system. Just a desire you have for a better sound from your bike.

-V-Twin engine design preferred

-Year make and model of bike

-Must be able to bring bike to our facility in Concord, North Carolina 28027

Please contact Rob at and put “R&D inquiry” in the subject line if you want to be part of the BCT team.