Our radiators are built with 2-rows of 1" cooling tubes, not the 3-row gimmicks with TINY 5/8" cooling tubes. These 3-rows are a gimmick! Checkout the comparison photos. A 2-row of 1" tubes has 2" of tube-to-fin contact area (1" rows x 2 rows = 2"). These 3-row radiators only have 1.59" of tube-to-fin contact area (3 rows x 0.531" = 1.59"). Also check out the core thickness – our core is 2-3/4" thick – the 3-row gimmick radiators are only 2-1/16" thick. A 2-row with 1.0" tubes has 26% more heat transfer surface area alone than these 3-row gimmicks with 0.531" tubes. That’s a HUGE difference!