CNC chamber softening that incorporates a generic radial conical softening like most companies use, into the existing chamber by way of a CAD modeled blend radius that transitions the conical softening into the chamber smoothly, leaving no ridges or edges like you see in conical only chamber softening. 

The use of a blend radius from the conical to the chamber makes for superior smooth transition, that further "softens" the chamber making it even less prone to detonation

Available for all our cylinder heads.