C-66-R is made to fit 396-502 non-EGR engines with rectangular port heads. C-66-O is made to fit 396-502 non-EGR engines with oval port cylinder heads. These cast aluminum manifolds have a low profile design for hood clearance, balanced firing order port runner arrangement and a consistent part-throttle operation with horsepower and torque gains.
This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Monte Carlo Manifold, C-66 Dual-Quad (Big-Block) C-66-O
Original Parts Group
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