well this is the perfect place to share this with everyone. i'm running fenton headers with an edmunds intake which of course eddy edmunds intended to be heated with water. the tube cast into the manifold is 5/8" OD, just right for 5/8 commpression fittings. that's exactly what used & then adapted down to 3/8" tube to the headers. works great, warms up very quickly. you can feel it on the side of the intake with your hand. the bypass tubes in the fentons DO WORK. i suspect that exhaust heat in hot weather probably probably hurts performance some. i also suspect the amount is miniscule.
Robert
