Trick Flow® R-Series EFI Intake Manifolds deliver a perfect balance of airflow distribution and velocity. The result is excellent low-end torque and superior horsepower. The manifolds are available in kits with a natural finish aluminum lower manifold and an aluminum upper plenum in your choice of silver powdercoat, black powdercoat, and natural finishes. These R-Series manifolds are designed for use on non-EGR engines. Manifolds for 351 Windsor engines with a 75mm throttle body inlet produce power in the 1,500-5,500 RPM range, and 90mm throttle body applications produce power in the 2,000-7,000 RPM range. Additional features: *Large cross-section with 13.300 in. runners *Overall height to the upper manifold flange is 11.500 in. *Overall height to the lower manifold flange is 5.375 in. *2.000 in. x 1.200 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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