Yes ! it gives the engine more snap, and more top end.........for anyone with a Plus4 or BTT looking for more power should look into the 41001 as well as the 9886........ The difference from a 2096/41021 to a 9886/41001 is like night and day, almost makes it a totally different engine....It is a shame how many people have never seen this engines true potential as they have never run anything but the pipes that neuter the performance.....