Originally Posted by
Davgill2002
Just over three years of using stage I. Prior to stage one no noticeable (seat of pants) gain was felt going from 87 to 91 octane, however, about 1mpg is gained depending on speed averaged, which is not worth it to me. Post flash, much better performance with either 87 or 91 octane. I consistently recorded 39-42 @ 60-65 thus stayed with 87 due to cost difference per tank. Never heard or felt pinging (detonation) on 87 and I am a lugger not a rever, e.g. full throttle at 40 in 6th gear due to great torque. All was done on a 2014 RTL with LaMonster cat delete, two brothers pipe, one baffle, and stage 1 by Wicked-Performance. I now have a 2023 S2S with BRP's performance exhaust, and an RLS cat delete with SS baffle. I want to go the stage II route but am waiting for Monster/Wicked-Performance to respond to my query regarding the SE6's semi auto downshifting if and when too great of load is placed on the motor.