[ds1]

I work on three drag cars and one has a set on. We found out the seats are junk like everyone else has said. I also found out that the rockers were not all lined up to hit the valve stem correctly. Only if you get a smoking deal on a used seat and have plenty of extra money to replace the seats and put new valves in that is the only way I would recommend them. One of the cars has Brodix BB2s on it and they work awesome. I bought an extra set of Pro Comp CNC ported heads for $175 that dropped a valve and pushed into the intake runner. The owner of the car is a certified welder specializing in aluminum. So no big deal for us. They flow good and can make big power. We have a 489 making 660 hp with a Comp hydraulic roller. But Pro Comp heads have issues out of the box.