The NHRA Technical department has noticed a number of Stock competitors spraying intake manifolds with an aerosol can, more specifically computer cleaner, which can reduce the temperature of the manifold to 62 degrees.

The 2004 NHRA Rulebook, on page 192 states that any method of artificially cooling or heating is prohibited: "Cool cans, wet towels, ice, etc., are permitted in Super Stock, Stock, Super Comp, Super Gas, Super Street, and E.T. classes. Wet towels, rags, ice, etc., must be removed before the vehicle leaves the staging area. Ambient-temperature air only; cooling or otherwise changing of the intake air is prohibited."

The use of these cleaning products is in violation of the NHRA Rulebook, thus ice and wet towels are acceptable forms of cooling, spraying of intake with any artificial spray or coolant is prohibited.