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The SFI Foundation has released four new specifications designed specifically for the roll-cage design on full-bodied cars. The specifications contain requirements that will affect at least some of the cars that compete in NHRA events (national, divisional, sport compact, and local series) and the events of alternative sanctioning bodies. The significant new and/or modified requirements are noted below:
SFI 25.1E
Application: Pro Stock-type tube-chassis roll cage; 7.49 seconds and quicker; 2,800-pound maximum
Implementation date: on all new chassis or next scheduled recertification, beginning Jan. 1, 2004
SFI Spec 25.1E is an updated revision to the current SFI Spec 25.1D with a few small modifications. The new spec limits the maximum total ballast to 250 pounds and implements minimum bolt and tab/mount requirements. The spec also provides the interpretation for the 2,800-pound maximum weight requirement. The other change is the addition of a 1 1/4-inch driver-side kidney bar that has been added in three of the four roll-cage configurations.
SFI 25.2
Application: Pro Stock-type tube chassis roll cage; 6.00 to 7.49 seconds; 3,200-pound maximum
Implementation date: on all new chassis or next scheduled recertification, beginning Jan. 1, 2004
SFI Spec 25.2 primarily affects cars that compete with alternative sanctioning bodies. The SFI 25.2 roll cage contains several upgraded components in the floor, roof, sides, and dash. These...