Add new 14.10E, re-letter subsequent sections accordingly:
“E. Catalytic converters may be replaced by aftermarket units. Replacements must: 1) be certified for use in that vehicle application
by the manufacturer or reconditioner, 2) bear correct EPA-mandated labeling, 3) be of the OE quantity and type (i.e. oxidation,
three-way, etc.) and 4) be used in the same location(s) as the OE converter(s). This does allow for high performance replacements,
provided they meet all restrictions herein.”
NOTE: This proposal is in response to member input from STS/STS2 competitors on the recent Stock category proposal to limit
catalytic converter replacement to OE-only, and to continuing questions regarding legality of OE-equivalent aftermarket cats. The
proposal meets two primary tenets of the Street Touring category by allowing a common street tuner performance mod (i.e. hiflow
cats) while maintaining emissions legality, as defined by the EPA. For reference, the EPA regulations are summarized in the
document labeled “What You Should Know About Using, Installing, or Buying Aftermarket Catalytic Converters” which can currently
be found at .

High flow catalytic converters are allowed, but must attach
within six inches of the original unit. Multiple catalytic converters
may be replaced by a single unit. The inlet of the single replacement
converter may be located no further downstream than 6"
along the piping flow path from the original exit of the final OE
converter.