Splayed-Valve 4.500 Bore Center Aluminum Cylinder Head Cubed

88958684
Your Price: $987.53

Suggested Retail:  $1164.54

Splayed-Valve 4.500 Bore Center Aluminum Cylinder Head Cubed
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Product Details


SPLAYED-VALVE ALUMINUM RACE CYLINDER HEADS
Chevrolet Performance Splayed-Valve Aluminum Race Cylinder Heads are extremely aggressive, all-out competition heads and not intended for street use. Splayed valves point both intake and exhaust valves at the center of the cylinder bore. As the valves open, they move away from the edges of the bore. That allows maximum-size valves to be installed without increasing bore size. The result is dramatically increased airflow, compared to inlinevalve- design cylinder heads.

The castings have a 0.240-inch minimum port wall thickness, which leaves ample room for extensive custom porting. Intake valves are angled 16-degrees to the deck surface and splayed 4-degrees. Exhaust valve angles are 11-degrees with a 4-degree splay. Making more than 1,000 naturally aspirated horsepower with these cylinder heads is easily achievable.

Aluminum Splayed Valve Race Head Technical Notes:
• Made of 355-T7 aluminum
• No valve seats or guides provided
• Extra-thick decks for angle milling or heavy flat milling
• Extra port material (0.240") for professional porting
• Completely revised intake and exhaust ports provide ultimate airflow potential
• 45cc “as-cast” combustion chambers
• Modified valve angles (16° x 4° intake, and 11° x 4° exhaust)
• Designed for longer-than-stock 2.200" and 1.650" valves
• Valve spring pads accommodate 1.625" diameter springs
• Revised location angled spark plugs (14mm, 5/8" hex, 3/4" reach, gasketed plugs)
• Designed for aftermarket shaft-mount rocker systems
• Custom-fabricated intake manifold required
• P/N 10185042 intake manifold gasket required
• Valve cover gaskets P/N 10185043 required

Splayed-Valve 4.500 Bore Center Aluminum Cylinder Head Cubed
• Great for NHRA competition with dual carburetors
• 240cc “as-cast peanut” intake ports
• 78cc “as-cast peanut” exhaust ports
• “Cubed” aluminum race head
• Bare head, no seats or guides