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

O-M-R

Buick 455

Cylinder Head Flow Numbers

Buick Stage I_____________Buick 455

Port Volume_______________________
Intake ..... 188 CC's .............. 186 CC's
Exhaust ... 142 CC's

CFM Flow @ 500" Lift________________
Intake ...... 224 CFM .............. 218 CFM
Exhaust .... 185 CFM .............. 147 CFM

The 'Stage I' Cylinder Heads had Round Port Exhaust. The Intake Port was slightly
different than the regular Buick 455, but was nearly the same size.

Buick claimed the 'Stage I' Cylinder Heads and Exhaust Manifolds were worth
an additional 50 Horsepower.