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2026 USRA Hobby Stock Rules

Posted March 21, 2026

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To view or download the latest rules, registration forms and more, visit usraracing.com/rules.

USRA released the 2026 Hobby Stock rules and incorporated most, but not all, of the Pure Stock Alternative Rules adopted at the Summit USMTS Nationals. We applaud the efforts of the USRA to bring all competitors under one set of rules. Because not all the rules were added, in addition to following the 2026 USRA Hobby stock rules the following clarifications, as established at the 2025 Summit USRA Nationals, will apply at I-35 Speedway:

  • If utilizing full spools in rear end, then 25 lbs. of lead must be added in front of the front shocks.
  • If utilizing adjustable dual brake master cylinders, then it must be adjusted to the center setting and disabled from being adjustable from inside the race car.
  • If the driver’s seat is farther back than 70 inches from the back of the engine, then 25 lbs. of lead must be added in front of the front shocks.
  • Camaros will not be allowed.
  • Holes in the hood will not be allowed and must be covered.
  • Suspension chains or tethers will not be allowed.
  • Right front bead locks will not be allowed.
  • Two-inch offset wheels or spacers to create two-inch offsets will not be allowed.
  • Exhaust EVAC systems will not be allowed.
  • The only tire allowed will be the American Racer KK704.
  • Quick steers will be allowed.
  • Carbon giber friveshafts will be permitted.
  • Must follow USRA Hobby Stock weight placement rule (excluding any penalty weight).
  • If utilizing 1.5 ratio roller rockers , non-spec USRA Hobby Stock headers or midplate then the following engine rules must be followed:
    • Maximum 0.456 lift (0.300 @cam) hydraulic camshafts.
    • Maximum 9:1 compression ratio.
    • 1⅝ non-stepped header.