how much if any does stacking the quad and the juice make the engine rattle, i assume this is b/c of timing. i havent got my quad back yet but hopefully it will be in and work this time. im very anxious to run these two. ive ran other stacks like the predator and hot juice but never anything like this. i also got a big Va who can loop the timing out of this so i can run the quad with it also? thanks Brett

In my experience it does cause any more rattle. The Quad 215 tune alone will rattle a little but beside that, it doesn't rattle more with the HJAT.