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Well an air intake or manifold intake?
Think the air intake might be legal, if not would move you to ASP.
Manifold intake, well I'm pretty certain that moves you either to SM, or some Prepared/Modified class (don't have a rulebook, and those two aren't online to view).
Pretty much you mess with the engine itself and you move into weird classes with very built-up competition.
13.10 Engine and Drive Train
A.The engine air filter element may be removed or replaced. A replacement element which is taller than standard may not be used to hold the air cleaner cover open. No other components of the air induction system may be removed, replaced or modified.
Yeah, you can't have that in stock, now at the regional level they probably would let it slide, depends on the club. But legally you should be in ASP.
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