The Stovebolt Site Forums The Shop Area The HiPo Shop Dual Offenhauser manifold heat

I like the two pipe one on each split exhaust manifold also as stated above because the symmetry of the appearance of the two tubes looks better. With the exhaust heat method does not circulate since you can not blow air into a bottle idea you do not get circulation but you do get heat transfer as already mentioned.

I personally went with water heat instead of exhaust heat and that's my choice not saying there anything wrong with exhaust heat. I chose it because I read water heat is slower but very clean and not corrosive to aluminum manifolds and water heat utilizes the water pump to continuously supply warm water to a passage underneath the manifold.

The bottom line we are all trying to prevent the manifold from staying cold or even building up frost under some conditions.