It really doesn't matter that much as long as it isn't right next to the throttle body or right after the turbo. I've run them on both the hot and cold side pipes and it works either way.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.