I am going to an ATV park in Gilbert MN. They have a db test of 99 at 1/2 max rpm.. My guess is its about 4000 for the DS. Anyone know what the DB is for the HMF power core 4? I do have the smaller end cap but dont want to use it..

 

You mean FMF power core 4 right!?

 

if it is the fmf it may be more than 99 at half, we have a 93 rule at 1/3 here in the oregon dunes a lot of us cheat but it still isn't a fun thing[img]i/expressions/face-icon-small-sad.gif[/img]

 

yea,
its the power core 4 with spark arrestor.