The big erson cam 286dur -510 lift I pulled out had a very aggressive sound vs the new cam from isky . I can tell it is not a stock sounding cam . just the right amount of lope for me. Very streetable cam with a Biggggggggggggggggg punch . Isky knows their cams for sure when Ron pulled this custom grind isky cam" t-3" out of his hat ! LOL. Nice job Ron !