Match Race 1972 ~ 'Road Runner/GTX 440' vs. 'Buick GS 455'

Cylinder Head Comparison

................................................1972 Mopar 440........1972 Buick GS 455 'Stage 1'

Casting #....................................... #3462346 ............ #1238148

Combustion Chamber 'Factory'........ 88.0 CC ................ 71.0 CC
Combustion Chamber 'Minimum'..... 82.0 CC ................. 59.0 CC

Intake Valve.................................... 2.080".................... 2.130"
Exhaust Valve.................................. 1.740".................... 1.755"

Intake Port 'Width'........................... 1.23" ................... 1.16"
Intake Port 'Height'.......................... 2.27" ................... 2.42"

Exhaust Port 'Width'......................... 1.78" ................... 1.24"
Exhaust Port 'Height'........................ 1.48" ................... 1.86"

Intake Port 'Volume'........................ 200 CC ................. 188 CC
Exhaust Port 'Volume'....................... 62 CC .................. 142 CC

Intake Flow @ .500" Lift .................. 218 CFM .............. 227 CFM
Exhaust Flow @ .500" Lift ................ 156 CFM .............. 183 CFM