Originally Posted by NacsMXer

S-type and Stingers are the same muffler. S-type is the universal version of the Stinger catback muffler. I think the XR-1 will still sound good, but if you wanted more of an apples to apples comparison to the Magnapack while experiencing a different sound, don't overlook the S-type.

I calculated the internal case volumes, and the S-type while seemingly very short, actually has slightly more volume than the Magnapack. Of course Magnaflow and Borla use different packing materials so the sound will be different for sure as well. The 5x15 round XR-1 has considerably more volume with which to absorb more sound so it's gonna be milder.

4x14 Magnapack (10416) = 175.929189 inches³

5x10 Borla Stinger S-Type = 196.42857142857125 inches³

5x15 Borla XR-1 Round = 294.6428571428569 inches³

Originally Posted by Arklight

The round XR-1 is more mellow than the Magnapack, but not mellow (if that makes any sense). It sort of has that thumpy sound the Magnapack has, but is accompanied by a deep bassy growl. It sounds very healthy.

If it were me, I would try a Bullet first (since it's cheaper), and if that didn't make you happy, I would put the round Borla in it's place (since the Bullet is smaller, you wouldn't have to add any pipe to do a swap).