NHRA Technical Department Makes Parity Adjustment to The NHRA Pro Mod Drag Racing Series

The NHRA Technical Department has made the following parity adjustments for the NHRA Pro Mod Drag Racing Seires. These rule changes 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.

Screw Supercharger: Reduced Overdrive from 75.0 to 65.0 %

4.9 Bore Space Roots Supercharger: 2640 lbs / 14.5 % overdrive               Maximum

4.8 Bore Space Root Supercharger: 2640 lbs / 14.5 16.5 % Overdrive Maximum

903 Nitrous: Base weight reduced 2540 to 2515 lbs

959 Nitrous: Base weight reduced 2570 to 2545 lbs

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