AFR's 220cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical "Pro Street" style builds.

220cc Race Ready™ Head Flow Chart
  .200 .300 .400 .500 .550 .600 .650
Int 155 210 260 295 304 312 318
Exh 116 162 204 220 225 229 233
220cc Competition Head Flow Chart
  .200 .300 .400 .500 .550 .600 .650 .700
Int 145 207 263 299 312 316 322 326
Exh 120 160 214 225 229 240 244 245

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.155", intake 3/4" radius plate exhaust, 1 7/8" curved pipe

 

Specifications & Features:
Material

A356 Aluminum

Intake Port Volume

220cc

Intake Port Dimension

2.220" H x 1.310" W x 3/8 Radius

Intake Port Location

Stock

Exhaust Port Volume

80cc

Exhaust Port Dimension

1.420" H x 1.545" W

Exhaust Port Location

.250" Raised

Combustion Chamber Size

65cc or 75cc

Valve Cover Bolt Pattern

Perimeter Bolt

Valve Angle

23°

Valve Spring Pocket Diameter

1.580" O.D

Max Valve Spring Pocket Machining

1.750" O.D

Warning: Do not machine spring pad any deeper.
Deck Thickness

.750"

Minimum Bore Diameter

4.000"

Flat Mill

.006" per cc 60cc Maximum

Angle Mill

.009" per cc 55cc Maximum

Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area

2.180 sq. in.

Spark Plug Dimensions

14mm x .750" w/Gasket Seat