Holley 4BBL Vacuum Secondary 600CFM Stage 2 – 1850S2 $649.00 SMI – STAGE TWO – 1850 (600 CFM) 4160 HOLLEY SINGLE FEED FOUR BARREL
Holley 4BBL Vacuum Secondary 600CFM Stage 3 – 1850S3 $749.00 SMI – STAGE THREE – 1850 (600 CFM) 4160 HOLLEY SINGLE FEED FOUR BARREL