Bob 4X4:
The actual numbers and company names are in the graph that appears in our ads in Diesel Power mag but the graph might be a little hard to read accurately. The head to head flow bench testing focused around 1,000 cubic feet per minute as a good round number. Then all manifolds were tested using the same exact parameters. CFM+ 993 cfm, Banks 828 cfm and stock 690 cfm. So the math is 993/ 828= 1. 199 which when rounded off is 20% more air. Math verses stock would be 993/ 690= 1. 439 or 44% more air.
Guys where's the love, we are on your side. What have some of those other companies done to you guys that you are so skeptical?
Finally if you’re the Bob that has the friend Randy that is the hunting buddy of a friend of mine, then I did call you a few months ago and left a message but never heard back. Now that’s a mouth full. Hope this helps and thanks for the interest in CFM+.