Originally Posted by Ohh_5H1T
I've only heard the perforated fix one in videos... I have the ACM mod and as far as im concerned i sounds more throaty and a bit louder on WOT. I LOVE my ACM mod no regrets. And i speak for all other guys that have it so far. It really depends on the sound you want. I prefer a growl over a high pitch rant and this was perfect for me.
Drone issues with the ACM?
Im having it done at MRF engineering in Lake Forest, CA.