Intake valves - 1.84 max. Rocker arms stock 1.7 ratio 13. Manifolds Absolutely no modifications allowed. No high-rise or spacer blocks allowed. Exhaust - headers are optional, street type headers only.
Mufflers are mandatory.
Mufflers must be removable for inspection. All cars must pass the speedway s D.B.A. test. Starter -must remain stock or stock replacement only. Water Pump must be OEM stock cast iron only. Transmissions - Drive Train 1.