In taking a walk out to the shop today, I found three different intake manifold sizes. They were 1/8" NPT, 3/8" NPT and 1/2" NPT. With Calipers they measure .405 inches for 1/8" NPT, .675 for 3/8" NPT and .840 for 1/2" NPT. Anyone know if there is more? The only 3/8" NPT ones I have seen are at that weird angle. Also, anyone know a good place to get Dorman fittings on the internet? I need 3/8" Inverted Flare (90 degrees) for all three sizes above.
