Sorry i don't have a sound clip, but i had a customer with this nice M3 come in and after we finished the muffler mod the thing just comes to life!

We did the inside section delete, but as i'm sure most have seen you can also do the outside delete which is very loud. Both style of mods sound great, but i really enjoyed the sound of this one.

car was super clean.

 

Lesson 1: you cannot post about improved exhaust sound without posting a video of this for proof!