D4B and LD4B side by side pics

It helps to get the intake as clean as possible. Bone dry. That way, all the overspray you caked up on the gasket surfaces and inside the plenum and ports will stay in place long enough to let you finish the assembly, then come off and blow through your engine once it's running. And cause leaks, too. Most of all, you save at least $2 in masking tape and you can use that money to buy mint flavored condoms.