Cylinder Head Core Deposit - Fully Refunded Upon Complete Core Return

At first I was skeptical over a set of CNC heads at such a low price. After calling and speaking with the owner Dirk Wagy my doubts were put to bed. Dirk is a regular guy like myself and answered all my questions with no pressure to make a purchase. I received the heads packaged safely and looking great! After installing heads I had to change pushrod length to be within backlash specs of my particular lifter set (Lunati link bar type). Had nothing to do with heads. Once that was squared away I finally got to crank it up and boy what a difference!! Considerable gains in torque and HP that I could feel throughout the entire power band of my LQ9 6.0 with Brian Tooley stage 3 truck cam. You will need to tune your set up accordingly as my shift points were way under where they could extend out to now. Shifts from 1-2@6750rpm vs 6200rpm and 2-3@6700rpm vs 6100rpm and 3-4@6600rpm and a whopping 130mph!! Still pulling nicely after the 3-4 shift which is impressive for a Z-71 with 35” mud tires to say the least. If you are doing a budget build or a high end one these heads will not disappoint. Wake up your LS with a set of these high flowing factory castings from Allied motor parts and use the savings toward another power adder.

The cylinder heads was in outstanding condition. The people at Allied was very professional when communicating with them.