The packs drone, but less than the Flows I had. However, if you have an offroad H pipe with the American Thunder system, the drone won't be bad at all.
Magnapacks drone as much as the Flows IMO. The Magnapacks are louder on the outside and quieter on the inside. Once I heard my wife drive off at WOT I couldn't believe they sounded that way from hearing them on the inside all the time. That was before I dumped them. In fact I was somewhat dissapointed because everyone said they where loud. I thought they were really quiet until hearing them from the outside. Haven't heard them from the outside since I dumped them.
How about the SLP catback? I've been hearing that the SLP is louder. What would you get? The Magnapack or the SLP catbacks? And explain why you would get it. Thanks.
the american thunder isn't that loud and the magnapacs sound would rape the flows in a db test. They are actually two different types of sounds you should listen to both and determine which you like the best. I have the Flows and kinda wish I had the packs or the SLP