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I have a SLP LM1 with stock manifolds and cats on my car that isn't super loud but drones all the time. I want to put a bullet muffler in place of the dummy LM1 muffler that will get rid of the drone and resonance inside the car. I've heard the Borla XR1 which is still pretty aggressive and the Magnaflow 14419 bullet which has a nice growl but I can't tell much more from Youtube videos. Does anyone have any recommendation for other bullet mufflers that aren't too loud or drone?
The magnaflow is good. I've had the dynomax bullet cat back with an off road y pipe and it was pretty aggressive. For drone the magnaflow might be better and if you want extra noise control you could have a separate bullet muffler welded inline before the main muffler to act as a resonator.
I have the LM2 on mine with the SLP Y pipe.
It can drone if I let it but, welding a SS strap across it's length moved the drone point up about 1000 rpm above my cruising rpm on the freeway.
Cheap fix but it works. (spent some of my time developing active noise cancellation during my engineering career)