The Dual Port and “C” Series accept the carter or Holley standard bore 4 bbl carb. Carb size recommended for DP is from 390 CFM to 500 CFM; for “C” Series – 500 CFM and larger. Use Holley No. 8007 (390 CFM), Carter 9400, or Carter 9500 on Dual Port – REMOVE KICK DOWN ARM FOR LINKAGE CLEARANCE. This instillation adds more horsepower to your 6 cyl than any other single piece of performance equipment. Our universal linkage accessory kit (Part No 6230) may be necessary on later models. Manifold fits with any headers conforming to stock specs. FOR AUTOMATIC TRANS. INSTALLATIONS – ORDER KIT NO. 5999K. “Customer interest proves the gaining popularity of 4 and 6 cylinder high performance. In response to this need, Offy has developed a “C” series of competition style manifolds to fill the void between absolute street performance and modified street/race applications. These manifolds have been designed to accept larger carbs of a performance variety because the plenum and runners of the manifold have been opened up to carry the high volume flow required by modified engines at higher RPM’s.These manifolds come with stock emissions provisions for those vehicles which might be used as modified street/race. Vehicles used in race only may block-off these provisions as necessaryThe “C” series Offy open plenum design boosts engine breathing characteristics and greatly improves the torque in mid to higher RPM’s. The torque range of these manifolds has been designed to fit into street modified and competition RPM requirements of the 4 and 6 cylinder engines . Depending on the size carb and engine type, the “C” series manifold has a fantastic range from approximately 2500 RPM delivering great performance thru 7000 +RPM. Naturally, the larger the carb, the higher the RPM range will be.”
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