Quote:

Actually the deleting of the exhaust gas crossover is what makes the intake an "airgap". Take a look at the pictures on the Edelbrock website and you'll see that is how they define it for the SB intakes. The BB intakes aren't called air gaps by Edelbrock.




Not to get into a pi$$ing match Andy, but read the Edelbrock SB RPM airgap description again (from their website):

"The air-gap design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power."

No mention of the heat crossover at all....they're referring to the runners being isolated from the valley. If isolated runners "define" the airgap terminology/decription then all BB manifolds that run a valley pan intake gasket are "by design" an air gap. Just because Edelbrock doesn't call the BB RPM manifolds airgaps doesn't mean that they aren't.

Sorry if you don't see it that way....



Ron