Edelbrock Part # 29785 Victor E EFI intake manifold for small-block Chevy has a larger and deeper plenum than the #2975. It provides maximum power in the higher rpm range for engines with standard port location iron and aluminum cylinder heads. Runners have a tapered cross-section, and plenty of material at the manifold port exit allows port matching to the small port heads used in NHRA Super Stock classes. 1" or 2" spacers can be used for performance tuning. The large plenum and runner volume of this intake manifold is also ideal for alcohol-fueled applications. The Edelbrock Victor E EFI is a single-plane, high-rise intake designed for maximum race-winning power at higher engine speeds.