The factory hoses work fine. My radiator is 1.5" upper, 1.75" lower (same as champion I believe) Engine side is 1.75" upper, 1.625" lower
Copy and paste from my post on FABO:
Quote:
Upper radiator hose for passenger side neck: Dayco C72282 - ID of 1.44 and 1.72 (for a 2006 Dodge Charger 5.7 hemi) Gates 22940 - ID of 1.44 and 1.75
Lower radiator hose for passenger side neck: Dayco E72225 - ID of 1.59 and 1.78 (for a 2008 Jeep Grand Cherokee SRT8 ) Gates 23036: 20.6" length, 1.63" ID, 1.75" ID
Upper radiator hose for drivers side neck: ?? - Jeep SRT8 upper radiator hose - appears to be 1.5" radiator neck, 1.75" water pump neck Goodyear 62968
Lower radiator hose for drivers side neck: Dayco E72281 - 1.44 & 1.66 ID (I measured this one in the store- the water pump side was ~1.5" I think, and the radiator side was smaller) - this is for a 5.7 dodge charger *I think a SRT8 lower radiator hose would have a larger hose ID for the radiator side. I don't know, as autozone and Rock Auto both do not have hoses for the SRT8 cars, period. Looks like you'll have to go to the dealer.]
-'02 Dodge Viper Ex-World Challenge racecar -'73 Duster, 6.1 based 392 hilborn hemi, tko600, full floater rear 9", Hellwig custom bars, viper brakes, built for road course