they were on top and when i went for a ride it was stumbleing real bad i actualy had to change my soark plugs.. so i took them out and its running fine now but after its fully broken in im goin to be putting a pt 61 in and a front mount.. i just thought i would need them for the port and turbo upgrades i did.. I also cant seem to find someone who tunes rx7s at least my air fuel ration or somthin i dont think my fuel is right..