Originally Posted by RETRO RC

the 053 will give you abit more top end than the 086 but watch for your run time to drop

I'm running a HN 2047 with a short smooth header on a plus21-5T and so far this is my pick
I'm getting really good run time and the power is awesome through out the range, the JP-1 wasn't to bad but I found a flat spot in the midrange with it that i could get rid of

I'm soon to be trying a HN 2062 which I beleive the JP-4 is based on so I'll let you know how it goes

Adrian