The NHRA Technical Department has released updates to the 2024 Pro Stock EFI Specifications. Unless otherwise noted in this document, these additional amendments will come into effect immediately. The 2024 NHRA NHRA EFI Specifications can be found under Tech, then Rules on NHRARacer.com, then NHRA Product Specifications.

These updates include the following changes…See the latest Pro Stock Product Specifications for complete details.

·       Engine Control Unit:

§  Must run NHRA-spec V6 Firmware

§  Without 3.5in screen: HEFI_06000404_PROSTOCK.eep

§  Using 3.5in screen: HEFI-ProStock_06004040.fwu

·      Intake Manifold:

o   Intake manifold plenum must be free & clear of any diffusers. Including but not limited to: air foils, baffles, and screens.

o   Surface of plenum area must remain smooth.