Anyone know if there are provisions in SCCA stock classes for secondary cats? The rules are written with the traditional setup in mind (i.e. "cat-back exhausts" are allowed) and as such, strictly forbid cat removal. From 13.10E:
Quote:
Any part of the exhaust system beyond (downstream from) the header/
manifold or catalytic converter, if so equipped, may be substituted
or removed provided the system meets the requirements of 3.5 and
3.3.3.B.15. Stainless steel heat exchangers are permitted only if the
physical dimensions and configuration remain unchanged.
Modifications of any type, including additions to or removal of, the
catalytic converters, thermal reactors, or any other pollution control
devices in the exhaust system are not allowed and the system must
be operable.
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I would imagine not since it contributes (however small or short-lived) to pollution control, and N54s are therefore limited to rear muffler section changes only in stock class, but perhaps there is a clarification somewhere?