Trick Flow® Box-R-Series EFI intake manifolds for Ford 351C and 351 Windsor-based Clevor engine conversions are computer-modeled and tested to deliver excellent air/fuel distribution and velocity for increased horsepower and torque. They feature a large plenum/short runner design that maximizes mid-to high-rpm power and torque, making them ideal for supercharged, turbocharged, nitrous, and racing applications that produce power in the 2,500 to 7,500 RPM range. Box-R-Series EFI intake manifolds from Trick Flow® are compatible with all 2V and 4V applications. All 9.200 in. deck height manifolds fit standard Cleveland engine blocks; 9.500 in. deck height manifolds fit standard 351 Windsor-based engine blocks. Manifold kits feature a natural finish aluminum lower manifold and an A319 aluminum upper in your choice of silver powdercoat, black powdercoat, and natural finishes. The manifolds are designed for non-EGR engines. Additional features: *Large cross-section with 11.000 in. runners *Overall height to the upper manifold flange is 12.000 in. *Overall height to the lower manifold flange is 5.375 in. *2.100 in. x 1.500 in. port size at head *2.380 in. x 1.380 in. port size at mating flange The upper plenums and lower manifold are also available separately.

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