One thing a lot of people on here forget is that the ETP heads are an 11 degree design. Due to simple math the ETP design 215's will have less cross sectional area to a 15 degree head with a 215 cc runner. It's really comparing apples to oranges.
The ETP heads are an amazing product and I personally wouldn't reccomend anything but them if the budget is in place.
Plus you get added p-v clearance just from the fact that they are an 11 degree design. A huge benefit for a lot of guys not wanting to flycut.
Nate |