Special order – Usually takes 2-3 weeks – Click here for more information!
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What does the phrase 'Will be special ordered for you' entail?
This indicates that the product is not currently stocked in our warehouse. We procure 'Special Order' items directly from the supplier upon receiving your order. Typically, we do not maintain inventory for these items.
'Special Order' products may either be shipped directly from the supplier or routed through our facilities before reaching you. The available shipping options will be presented during the checkout process.
Once you place an order for a Special Order item, we will specially order it for you, and there is a restocking fee of up to 15% depending on the item in case of cancellations.
As Roco 4x4, we commit to providing updates on your order within a maximum of 2 business days, offering an estimated time of arrival (ETA) for the item. In the event that the item is discontinued, we will promptly notify you.
Cylinder Head Specifications: Combustion chamber volume: 60cc; Intake runner volume: 190cc; Exhaust runner volume: 90cc; Intake valve diameter: 2.05"; Exhaust valve diameter: 1.60"; Valve stem diameter: 11/32"; Valve guides: Manganese bronze; Deck thickness: 5/8"; Valve spring diameter: 1.55"; Valve spring maximum lift: .580"; Rocker stud: 7/16"; Guideplate: Hardended steel; Pushrod diameter: 5/16"; Valve angle: Same as OE 9.5°; Exhaust port location: Stock; Spark plug fitment: 14mm x 3/4 reach, gasket seat. INSTALLATION NOTE: Match with Edelbrock head gasket sets on pages 84-85. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. Recommended spark plugs 14mm x 3/4" reach with flat gasket seat (Champion RC12YC). Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 5/16" (width of slot in guide plate). Valve sizes are recommended, not maximum. IMPORTANT NOTE: “Compact charge” kidney shape combustion chamber design. Intake and exhaust ports based on 2V design. Optimized spark plug location provides improved header clearance. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 5/16" (width of slot in guide plate). Valve sizes are recommended, not maximum. Performer RPM Clevor cylinder heads with 7/16" bolts on 289/302 engines, use Edelbrock stepped head bolt washer kit #9680.
