![]() Use of vacuum pump for evacuation of crankcase pressure permitted.Īccepted engines: - 4 Cylinder Maximum capacity 3.0 LtrĮxhaust: Open exhaust permitted, except where prohibited by track rules. Deck-plate and/or welding on deck surface prohibited. Dual stage nitrous systems or multiple superchargers/turbochargers will be counted as one power adder each. Billett plates and rotors permitted on all Rotary engines. Billet block and cylinder head combinations permitted on 4 cylinger engines. Replacement block must accept original cylinder head, and function, with no Modifications. Replacement cylinder head must bolt to original block, and function, with no modifications. ![]() Billet block or cylinder heads permitted on 6 cylinder engines. Any production 4, 6 cylinder or 2, 3 or 4 rotor engine permitted. Factory Xtreme Group reserves the right to amend weights in order to maintain parity in the class.Įngine: Engine swaps permitted but engine manufacturer must match body manufacturer, refer Body Section.
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