Features:

• Fits OE & aftermarket Big Block Chevy engines which have OE standard or tall block deck heights. 300-802 for standard 9.800-inch height, 300-803 for tall 10.200-inch height
• Hilborn high-quality heat-treated aluminum valley cover castings, ceramic coated a beautiful dark gray
• The injector manifold throttle cross-over link appropriate to the engine deck height and throttle shaft center to center distance is included in the valley cover kit
• The machined valley cover provides two -10AN O-ring sealed ports, these ports can be used for crankcase breathers, installation of a dry sump oil scavenge pick-up, or an oil fill location
• The Hilborn Big Block Chevy valley covers are intended for use with a set of Hilborn EFI-R injection manifolds but these valley covers could also be used as part of a custom induction system being built
• Ram Tubes and Lifter Valley Covers sold separately
• Large 3.00-inch butterflies provide maximum airflow and are recommended for maximum performance or race only applications.
• Street/strip applications should consider the 2-7/16 PN 300-800 or 2-5/8 butterfly size PN 300-801
• Some applications may require changes to throttle linkage ratios for increased throttle tip in control
• Converging tract design provides increased air speed for maximum cylinder fill
• High injector placement helps to optimize fuel conditioning for a dramatic increase in engine acceleration rate