Which would work well if you figured out a higher lift cam because these heads are complete with the 650 lift springs already on these heads. Let me know if interested. They are currently at A2Speed in Va where i am having mods made to my car
No issues with the heads. They are great heads just changed to the thiteks because they are known to be better and flow better and the dual bolt pattern on the thitek heads because i have the hellcat front belt setup on the car.
Apache are good heads, but I found they would not take a lot of boost. Seemed ok at 14lbs, but when I went to 20lbs they did not hold up. Price is right for these heads and if you are not going to do a lot of boost it would be a good upgrade.