I had a generic Summit Racing unit, crossflow with a 26" width and 2 rows of tubes. It worked great but when I started an A/C swap, I went with a different WP housing and a different outlet design and needed a different radiator. I bought a "Speed Cooling" unit, 26". It fit great, a factory shroud fit and it cools the 440/493 just as well as the other unit. No improvement, no setback...I never had an overheating problem before though.