CNC Ported Aluminum SB Chevy Cylinder Heads Bare, CNC215 ( 2 heads)

CNC Motorsports high flowing CNC Ported cylinder heads are made out of high quality AC4B aluminum alloy and feature a street performance 3-angle valve job, bronze valve guides and ductile iron valve seats. This is an excellent out of the box performance cylinder head that doesn't break the bank.

• Material: Aluminum
• Combustion Chamber Size: 66cc
• Intake Port Volume: 215cc
• Exhaust Port Volume: 70cc
• Intake Valve Diameter: 2.020"
• Exhaust Valve Diameter: 1.600"
• Intake Port Location: Stock
• Intake Port Shape: Rectangle(Stock) Use Felpro 1206 or 1206S-3
• Exhaust Port Location: Stock
• Exhaust Port Shape: Square
• Valve Angle: 23°
• Valve Guide Length: 2.100"
• Valve Stem Diameter: 11/32"
• Valve Cover Bolt Pattern: Perimeter & Center
• Spark Plug Angle: Angled
• Spark Plug Dimensions: 14mm x 3/4" w/ Flat Seat - NGK5671A-8

Stock Intake Flow

• .100 - 69 cfm / CNC Ported 70 cfm
• .200 - 144 cfm / CNC Ported 144 cfm
• .300 - 201 cfm / CNC Ported 203 cfm
• .400 - 239 cfm / CNC Ported 248 cfm
• .500 - 254 cfm / CNC Ported 271 cfm
• .600 - 260 cfm / CNC Ported 286 cfm

Stock Exhaust Flow - No Pipe

• .100 - 50cfm / CNC Ported 55 cfm
• .200 - 96 cfm / CNC Ported 100 cfm
• .300 - 33cfm / CNC Ported 140 cfm
• .400 - 162 cfm / CNC Ported 171 cfm
• .500 - 177 cfm / CNC Ported 195 cfm
• .600 - 190 cfm / CNC Ported 209 cfm