I have the m2 with the P1X Powertip, powercommander using the m419-001 map (stock exhaust, air filter). This map runs better than the m419-002 (two brothers map).
I have no backfiring or popping on decel
I have the TB's M2 aluminum slip-ons on my FJR and am quite happy with them. I am very happy with the size and look of them.
I thought that they were too loud (setting off car alarms), so I got the P1X Powertip sound arrestors and think that the sound is now just right.
Purchased recently from...
