Hey, sk8r8919, the cooling head is red 'cause it's a Fantom .12 engine. I just put it in about a week ago. I haven't even gotten it broken in yet b/c I'm having some problems with the exhaust leaking, so I'm waiting until my mom will order a new pipe and manifold for me (I'm paying for it, but I have to have a credit card) so I can drive it again. Once I get it up and running, I'll post some pics of my Rustler in action instead of inside, "posing" for the camera[8D].