Dart Pro 1 heads
#8
Registered

Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
Jim Valako is always the guy I go to with these questions as he grinds and flows all day. He has done work for me for over 20 yrs now. He'll more than likely tell you the 2.30's and 1.85 or so on the exhaust. His number is 616.889.0928



