RS-X Spread-Port Aluminum Cylinder Head — Bare - PRE ORDER !!

Your Price: $1,949.00

Suggested Retail:  $2112.67

RS-X Spread-Port Aluminum Cylinder Head — Bare - PRE ORDER !!

Product Details

RS-X Spread-Port Aluminum Cylinder Head — Bare
Un-ported bare head casting; Valve seats and guides included, but delivered uninstalled; As-cast ports and chambers; Un-machined deck

The high-rpm airflow requirements of Pro Stock engines influenced the design of Chevrolet Performance’s RS-X spreadport Big-Block cylinder head design, which is used on the ZZ632 Deluxe crate engine. It uses a raised, symmetrical port design rather than the conventional Big-Block siamese design, for greater port-flow equalization. The heads are designed for large-displacement high-performance applications, where high-rpm airflow is a must for maximum performance. They’re used with a shaft-style roller rocker system. Assembled heads feature 2.450/1.800-inch titanium valves and beehive-type springs

RS-X Spread-Port Cylinder Head Technical Notes:
• Made from 356-T6 aluminum
• Will fit large-bore standard- and tall-deck blocks
• 0.750" deck
• Intake port volume (nominal): 449 cc
• Exhaust port volume (nominal): 161 cc
• Chamber volume (nominal): 70 cc
• Intake flow: 481 cfm @ 0.787"
• Exhaust flow: 347 cfm @ 0.787"
• Rocker bar required
• Designed for shaft-mount roller rocker arms
• Designed for 7⁄16" pushrods
• Requires custom exhaust headers

WarningCalifornia Proposition 65 Warning