22 Cylinder Head Flow
| .100" | .150" | .200" | .250" | .300" | .350" | .400" | .450" | .500" | .550" | .600" | |
| Stock 20R Intake | 53.3 | 86.3 | 106.5 | 132.4 | 153.3 | 158.2 | 156.6 | 153.8 | 153.2 | 151 | 152 |
| Stock 20R Exhaust | 50 | 67 | 84 | 97 | 110 | 120 | 130 | 135 | 140 | ||
| 20R Street Intake | 54.6 | 83 | 113.4 | 135 | 162.1 | 180.4 | 186.2 | 178.9 | 176.1 | 172.9 | 172.6 |
| 20R Street Exhaust | 58 | 73 | 88 | 101.5 | 115 | 126.5 | 138 | 144 | 150 | ||
| 20R Stg 3 Intake | 56.9 | 79.6 | 107.6 | 133.7 | 160.1 | 176.9 | 188.7 | 188.7 | 186.7 | 185.3 | 183.5 |
| 20R Stg 3 Exhaust | 60 | 75 | 90 | 104 | 118 | 129 | 140 | 148 | 155 | ||
| 20R Stg 5 Intake | 85.6 | 115.2 | 145.8 | 171.1 | 191.4 | 201 | 210.6 | 219.5 | 226.2 | 231.5 | |
| 20R Stg 5 Exhaust | 60.2 | 76.7 | 93.2 | 107.4 | 121.6 | 133.2 | 144.8 | 153.4 | 160 | 161.6 | |
| Stock Late 22R Intake | 54 | 81 | 99 | 116 | 127 | 133 | 135 | 136 | |||
| Stock Late 22R Exhaust | 43 | 75 | 96 | 109 | 118 | 130 | 138 | 141 | |||
| Late Stg 2 EFI Pro Intake | 58.3 | 84.9 | 105.3 | 120 | 129 | 134 | 138 | 139 | |||
| Late Stg 2 EFI Pro exhaust | 45 | 79 | 99 | 111 | 123 | 136 | 144 | 148 | |||
| Late Stg 3 Intake | 73 | 109 | 145 | 161.5 | 178 | 186.5 | 195 | 200 | 205 | 207 | 210 |
| Late Stg 3 Exhaust | 43 | 75 | 96 | 109 | 118 | 130 | 138 | 141 | 153 | 154 | |
| Late Stg 5 Intake | 60.7 | 86.5 | 109.5 | 132 | 153.9 | 171.9 | 186.1 | 199.2 | 211.4 | 211.8 | 223.7 |
| Late Stg 5 Exhaust | 60.2 | 76.7 | 93.2 | 107.1 | 121.1 | 133.9 | 144.8 | 153.4 | 158 | 161.6 | |