What hoses should I use to hook up the LS1 to the rad? Lower and upper.

 

Upper hose for an '02 Chevy Silverado 5.3L
Lower hose for an '01 Trans Am without PS cooler (1-piece hose)

 

Thanks alot!

 

I bought them and they didn't work. The top one is too long, and the bottom hose isn't big enough on both ends to fit on the rad and the water pump. Is the 4th gen rad outlets smaller than a 3rd gen? I am running a 3 rd gen rad. Did you mean for me to mod therse hoses?

 

YOu have to trim the hoses a little to make them fit. They go one alright but it takes lube and effort to get them on especially the lower one. Speaking of the lower one the one listed above doesn't fit worth a damn. Take it back and get the gates hose listed here

https://www.thirdgen.org/forums/engi...lower+rad+hose

 

Here is the upper i used, no trimming, no lube. Gates # 20893

 

Ahhh come'on A little lube can make the best of any tight situation