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Fleece Performance Freedom Series Cummins Cylinder Heads

Fleece Performance Freedom Series Cummins cylinder heads are offered in Street, Street-HD, and Performance versions. Each cylinder head is manufactured in Fleece's state-of-the-art cylinder head machine shop and guaranteed to meet or exceed factory specifications. All heads are inspected, pressure checked, decked, painted, and ready for installation. All versions include hardened, oversized press-in valve seats, new valve guide liners, and 11 screw-in freeze plugs to ensure you'll never worry about a coolant leak under the valve cover again! Choose the remanufactured version designed for your Cummins engine. Street and Street-HD versions also feature: * Perfect for a daily driver or heavy-duty towing * Rated for use up to 700 hp * Street: -- New Cummins valve springs * Street-HD -- New heavy-duty Fleece 105# valve springs -- Tool steel retainers Performance versions also feature: * Whether you are sled pulling, drag racing, or just looking for extra power when towing Fleece's Performance heads will get you the power you need * Rated up to 1,100hp * Fire ring the cylinder head (all in the head) * Manley 1.300 in. stainless valves * 105 valve springs and steel retainers * Fire ring gasket kit with multi-layer steel gasket * 4.550 in. diameter rings

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