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RHS is now offering a new single-plane alloy intake manifold that matches directly with its 23-degree small-block Chevy head. The company is also releasing a new higher-flowing version of its Pro Elite LS7 CNC-ported rectangular port cylinder head to complement its LS Race block.
“These 23-degree manifolds will reduce the port-matching time for engine builders,” says Kevin Feeny of RHS. “They also have dual bolt patterns to work with all types of Gen I heads, including GM Vortec and late-model perimeter-corner mounting.”
RHS offers single 4-barrel carburetor and EFI versions of its new 23-degree intake manifold.
The new LS7 rectangular-port cylinder head now comes with 307cc intake runners. The previous Pro Elite model — which is still available — has 291cc intake runners.
The new Pro Elite LS7 rectangular-port head has 307cci intake runners.
The Pro Elite heads feature a raised (.220-inch) intake runner design that will fit stock and aftermarket LS7-style manifolds and valvetrain setups. They come with a 12-degree valve angle and utilize the 6-bolt design. Other features include .750-inch thick deck, .100-inch raised exhaust ports and reinforced rocker rails.
RHS’s LS block comes in standard 9.240- and 9.750-inch deck heights. It’s made from A357-T6 aluminum with Siamese-cast bore walls and press-inch spun-cast iron liners. The cam centerline is raised .388-inch and the block will accommodate a 60mm camshaft.
The RHS LS7 race block offers numerous performance features, such as provisions for oil squirters, material to bore out lifters and billet main caps.
