Description
"Built by JGY" Looking for more power than 350HP on your SR or RB and want it to be reliable? All our motor build ups are done in house and overseen by Jason. Over-attention to detail is used in all assemblies and measuring. We will completely tear down your motor, bore it, do 3 angle valve job, replace seals/guides, install pistons/sleeves/rods, measure/order/install all bearings, install aftermarket parts/cams/intakes/turbo, and then ship the completed motor to you ready to drop into your vehicle. SR20 heads are one of the industries tightest tolerance heads made. The shims that ride on the valve tips come in thicknesses that vary in ".001. That means that the acceptable range is just ".0005. This is important once you realize that the cam pushes on the rocker arm and the arm pushes on 2 valves. If the valves are at different heights, then the rocker is at an angle, which wears on the cam/ruins it/causes extra friction. We are able to take it one step further and give you a shim height that is just ".0002 or less. Typical price is about $100 labor. When you ship your head, please include all your shims and guides.