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For maximum head gasket retention, these heads include two auxiliary head bolt holes. The combustion chambers have been CNC machined to a volume of 94cc for use with high compression pistons. * Forged aluminum shaft-mount roller rocker arms with 1. These heads use an industry standard spread-port layout to maximize compatibility with existing manifold designs. Dual plane design with spread bore bolt pattern. It has an 18-degree intake valve angle, is fully CNC ported, and assembled with 2.500/1.960-inch stainless steel valves in 92-cc combustion chambers. This manifold is CNC port matched to GM Performance parts oval port heads. * 58X reluctor crank-triggered, coil-near-plug ignition The Big Victor Spread Port 18-degree CNC is Edelbrock’s version of the latest spread port cylinder heads. exhaust valves made of titanium with a 5/16 in. * Aluminum RS-X symmetrical spread-port cylinder heads with 70cc chambers * Aluminum high-rise single-plane intake manifold
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These big block engines reach peak power at 6,600 rpm and rev to a recommended maximum of 7,000 rpm. Included is a pre-programmed, self-learning control system for precise fuel control and amazing output on premium pump gas. ZZ632 crate engines have a crank-trigger ignition system with coil-near-plug ignition coils mounted on a unique valley plate. These RS-X cylinder heads feature symmetrical ports to produce similar power from all eight cylinders. Chevrolet Performance's ZZ632/1000 deluxe long block crate engines are their biggest, big block yet! They start with a tall deck Sportsman Bowtie block and an all-forged roller assembly and add a hydraulic roller camshaft and high-flow spread-port CNC-machined cylinder heads derived from Pro Stock racing technology.
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