Based on the Holley EFI Factory X performance numbers from the 2024 season the NHRA Technical Department has made the following amendment to the supercharger section.

 SUPERCHARGERS Must be correct year, make and model specified & accepted for cars engine. Sandblasting, grinding, flash removal, dry film coating, or any other modification to Supercharger, intake manifold or intercooler prohibited. Intake manifold and intercooler must remain in stock, NHRA accepted condition. Supercharger case may be ported on the inlet side only. Any discharge port of the case or manifold must remain as stock, NHRA accepted location and dimensions. Supercharger case may be coated. Rotor assembly must remain as NHRA accepted, brand manufactured, length, helix and diameter. Modifications to rotor prohibited. Coating of rotor permitted. Any supercharger drive system must remain NHRA accepted and unaltered. Pulleys Aftermarket pulleys accepted but must maintain NHRA accepted diameter and type. Pulleys that are not of correct diameter, tooth count or placement are prohibited.

This rule change will go into effect immediately. NHRA reserves the right in the future to make additional rule changes to control performance and maintain parity in the category.