After looking for an aftermarket radiator, I've been torn with which way to go, double pass or single. Looking at some drag racing sites and such, they say that it requires about 33% MORE water flow than with a single pass for proper operation. The size I'm going with is 16"x27.5" and 3" thick. I can get this in either configuration for under $250.00(summit, howe radiator). I also know that K2RD's radiator is double pass and I would seriously doubt that they would sell something that didn't work very well. Which really brings up my question. Which style to go with? Also, is the stock radiator a double pass??? The inlet and outlet are on the same side and the only way I could see that working correctly would be to double pass it.

 

stock one is single. from top to bottom.

 

i don't have one yet but the k2rd radiator is the best for the price will have one soon. doulbe pass still flows enough just a second time.... i also had luck droping my thermostat to a 165' keeeps it nice and cool==