So i ordered the viper fan for a 2000 r/t installed good. But when i wired it like Sam said in instructions (wired into o2 sensor) truck bawgs out as if its flooding. So i hook it up the optional way to the radio like it says. Now runs fine but no radio. All wiring is correct, it comes on with a/c and with thermostat. Anybody else have these problems. Not to worried cause i dont drive daily and my brother is gonna make his own wiring setup, but it should work like he says it should. My opinion his work sucks. Pay 500 to wait for 12 weeks only to get a product that doesn't work the way he says. Not to mention the overflow had a crack on the bottom. Buyers Beware. No more ordering coming from me.