I have dyno tested the Eddy Performer RPM intake versus both a Eddy Torquer two and then a Mopar M1 single plane, all within two hours of each other on a 484 pump gas street 426 wedge motor(stock size intake ports, not M.W.) and the Performer RPM was best below 5000 RPM compared to the M1 and way better all the way from 2500 RPM to 6500 RPm compare to the Tquer 2 I like tham a lot, if you don't buy it I would be glad to I'll even give you a $25.00 finders and commission fee Please let me know if you don't want it.