Stock intake vs performer?

Yep! I've got TRUE test numbers, called an E.T. slip. The cast intake is about 2.5 tenths faster on a 340 with a mild cam (.474 lift, 280 adv. dur.) and headers. NOW, the LD340 intake was worth 1.5 tenths over the cast. The edelbrock performer is a nice way to put a 4bbl on a 318 or 360 2bbl. The edelbrock RPM is a better choice. I personally like the Weiand Action Plus over the eddy performer. I have the Weiand action plus on a 318 now, and I like it. I've seen a magazine test where the Weiand action plus was worth 1.5 tenths over the cast (it was a 340 4-speed car), and they got another 1.5 tenth when they went to the Xcelerator because of the 4 speed