HEATED 4 BBL INTAKE

Clifford intakes are the ones with the water passage built into the bottom side. I believe they made them both ways, with or without the water jacket so you'd want to verify which one you are buying. An Offy has a spot to bolt on the original heat riser from the exhaust, which does the same thing but quicker than waiting for the coolant to come up to temp. The Offy also works with the Dutra Dual setup, a very good upgrade. For most of us not living in a hot environment (say, from AZ to FL) some kind of intake heat is a real benefit for good street manners. The heat keeps the atomized fuel from hitting the floor of the manifold and turning back into liquid.

If someone had a reason to want an Offy and either headers or dual Dutra Duals (meaning no exhaust heat riser available) there is a guy on eBay selling a riser block-off plate for about $15 or so. I got one with the intent to tap it for hose fittings and make it work like the water jacket on a Clifford. Also, Aussie Speed sells a similar gizmo, it's a little box that's already tapped for pipe fittings. You attach it to the bottom of your manifold and get the water heat that way. It's a little more at about $60 or so but a slick solution if you need it.