Ideal for high-rpm drag race applications, with electronic fuel injector bosses the Victor E EFI 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 aluminium 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 manifold is also ideal for alcohol-fuelled applications. Made in USA