My Mishimoto radiator leaked after about 2000 miles driven in 16 months. Actually, I had suspected a leak a while back but it took being in a Christmas parade to know I had a leak. I put the pressure testes on it, and the coolant flowed out the leak.
I put my old stock radiator back on and wrote Mishimoto about covering it on "extended" warranty. It leaked on the lower passenger side tank area. It seems to me that this may be a defect in the design, since so many others have had a problem.
As far as cooling performance, it never seemed to cool any better than the stocker once I ran more than 30 miles. Both radiators worried me when driving the highway in 90 deg plus temps.
I put my old stock radiator back on and wrote Mishimoto about covering it on "extended" warranty. It leaked on the lower passenger side tank area. It seems to me that this may be a defect in the design, since so many others have had a problem.
As far as cooling performance, it never seemed to cool any better than the stocker once I ran more than 30 miles. Both radiators worried me when driving the highway in 90 deg plus temps.