Any equipment, component, part, or modification which is performance affecting and which is not specified in this Chapter IV will be assigned 11 points and will automatically place a vehicle in the appropriate Modified class.
Vehicles in the classes of the Street category must be as they could have been delivered in the United States from the dealer in their model year, must be eligible to be classed in Production classes P1 through P8, or class I3 if not progressed, but may have only the following limited changes from factory stock condition:
Modifications which are not performance-affecting are permitted.
Wear items such as gaskets, air cleaners, clutches, shock absorbers, brake pads, and spark plugs, may be replaced with any brand of such item.
Removal of the spare tire, jack, lug wrench and tools is permitted.
Suspension and engine parts may be adjusted to any setting as long as no machining or other modification is necessary to effect the setting.
Jets and emulsion tubes may be changed on any car originally carbureted.
Any chain tensioners or guards are allowed.
Interior modifications: Any accessory, gauge, or indicator may be fitted if its purpose is to improve driver or passenger comfort or convenience and provided such items have no effect whatsoever on mechanical performance. Floor mats may be removed. Race seats and five or six point belts are not permitted in the Street classes.
Roll bars: Safety devices consisting of lateral members and longitudinal braces, all attached within the passenger compartment are permitted. Upholstery may be removed if necessary to accommodate bolt-in roll bars.
Parts such as sway bars and wheel rims may be replaced with aftermarket parts with the same specifications as the original factory items.
Tires: Tires must be DOT approved and have a tread wear rating of greater than 140. Tires must also meet Colorado State requirements for tread depth. This requires at least 2/32ds of an inch of tread depth measured in any two tread grooves at three locations equally spaced around the circumference of the tire, or, if the tire has tread wear indicators, the tire is deficient if it is worn to the point that the tread wear indicators contact the pavement in any two tread grooves at three locations equally spaced around the circumference of the tire.
RMR/AMR Event Rules – 2008Page 12