Racing Head Service is now offering LS7-style heads for original LS cathedral port engines. RHS Pro Elite 3.900″ Bore LS7 CNC-Ported Cylinder Heads not only get the best LS rectangular port heads onto all GM LS 5.7L – 6.0L blocks, they also provide up to 100 bolt-on horsepower over stock and feature all the benefits of other RHS LS7 heads.

These new Pro Elite cylinder heads fit all LS applications down to the 3.900″ bore, and utilize LS7 intake manifolds. Offered in CNC and P-Port (unfinished runner) versions, the heads’ intake ports are raised .220″ from the stock location for a straight line of sight into the cylinder, and utilize the LS 6-bolt head design compatible with the RHS LS Race Block and GM LSX Block.

They can also be used with OEM, 4-bolt blocks. Additionally, a .750″- thick deck surface and reinforced rocker rails make for more rigidity in high horsepower and boosted applications. RHS Pro Elite™ 3.900″ Bore LS7 CNC-Ported Cylinder Heads are designed to use eight standard LS1-style exhaust rockers and eight offset LS3-style style intake rockers and stands. Buyers will save money, as they won’t need to order a full set of less common 1.8 ratio LS7 rockers.