IHRA · Forced induction
IHRA answers this part for 29 of its classes. 2 of those answers permit the part outright and 0 permit it with stated conditions, leaving 27 that do not. 2 of the ones that do not are classes we read as open rather than as refusing it. 20 are inferred from how the class is written rather than quoted from a rule naming this part.
29 classes, grouped where the same rule gives the same answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.
Not legal 6 classes
Nitrous oxide is not permitted, and neither is a turbocharger unless the craft came with one.
Not legal 1 class
No nitrous, no spraying. · DD.7
Not permitted, not listed in the rules 18 classes
On a closed list an unlisted modification is not permitted. · A.2.2, J.1
Legal 2 classes
Power adders are allowed in terms, which takes in a nitrous oxide system.
No rule, this is an open class 1 class
No restriction in section CC, and CC.1 permits any modification it does not restrict.
No rule, this is an open class 1 class
The class states only what it bans and calls itself run what you brung, against a section DD preamble that says anything unlisted is illegal.
Nitrous oxide system: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.
Every IHRA class · where the rulebooks differ · checks on parts the shop sells · how this site reads a rulebook.
Forced induction · two and four stroke · legal in 2 of 29 answered