1:3 EXHAUST
All cars must be equipped with exhaust collectors, headers, or
stacks installed to direct exhaust out of car body to rear of car,
away from driver and fuel tank. Exhaust collectors/stacks must be
securely fastened (i.e., metal connector straps, bolted, welded,
etc.) to prevent loss of collector/stacks during competition. Flexible
tubing, or “flex pipe,” prohibited in all categories. All Power Street,
Unlimited Street, and E.T. Bracket cars must be equipped with
functioning mufflers and may be required to meet maximum
decibel limits at certain facilities. If mufflers are used, they must be
securely attached to exhaust system and car body or frame.