Sonny's Racing Engines has released their new 5.3 GM-style Hemispherical cylinder heads and are available in either a complete race ready version or a race ready casting. These heads flow over 700 cfm at 1.200" on the intake and over 470 cfm at 1.200"
on the exhaust.

This is the ultimate cylinder head for performance and is available for several different applications including pump gas combinations, natural aspiration and nitrous or blower engines.

These cylinder heads work well with displacements upwards of 940 cubic inches.

For more information, www.sonnysracingengines.com or email Todd at sonnysracing@aol.com.