[D_Thissen]

Originally Posted by Vin

This is -5 , higher frequency of pops and also the sound is higher tone, popcorn:

https://photos.app.goo.gl/4liEBWosYpzRdEFK2

This is +5 on a dyno, lower frequency and a lower tone, more a burble/fart than a pop:

https://photos.app.goo.gl/w4IYkqxjd7nPwEqC3

Results will vary per exhaust setup. I'm using a catless UEL and a high flow cat in the front pipe, resonated mid pipe and aftermarket (custom) axle back.

Dank je
@bababooey I've noticed the negative values at higher rpms produce a sharp pop. Similar to a gun shot.