I would say ceramic on the headers. I couldnt really say how hot they get.......but i d@mn sure dont like getting my shoulder on the pipes when Im changing oil(OUCH). my system is pretty warm to the trans crossmember, the H pipe is just behind the crossmember........after that point, it cools down a bit. Good luck...crazyL 
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....
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