The OFNA 086 hands down. I have tried many Pipe/Manifold combos with my Modified and Stock Picco .28. The dynamite 086 SHOULD be the same but not as great as the OFNA 086. However the Dynamite 086 manifold works great with the OFNA 086 pipe. Weird combo but it is awesome. I also ran a RC hub manifold for Savages and it has had the strongest low end punch. I have made 9 1/2 minutes with a Drag Modified Picco .28 matched with a 7.5 carb insert.
There is only one pipe thats beat RC manifactors, thats is the ERCM pipe, but it is not allowed in races. It is loud!
Here is the link for the B2R Manifold
http://rchub.com/Merchant2/merchant....Code=manifolds