Buick / Olds / Pontiac: 1975 231ci Dual Port Std 4 bbl (no HEI)
Detroit's re-discovery of the V-6 doesn't surprise Offenhauser engineers at all. They have been making 360 Equa-Flow manifolds since its original introduction in the early sixties by Buick. Now available is the Dual Port design which gives the V-6 extra punch in low to mid RPM's and better gas mileage without altering the emissions. Uses standard 4 bbl carb from 400 CFM to 600 CFM depending on whether it's for street or competition
