OEM part required 3 classes
Must remain OEM.
- Runabout Lites · AA.3.1
- Runabout GP2 · Y.3.1
- Runabout GP3 · Z.4.1
IHRA · Fuel
Aftermarket intake manifold
IHRA answers this part for 29 of its classes. 4 of those answers are permissions, with or without limits attached, and 25 are not. 19 are inferred from how the class is written rather than quoted from a rule naming this part.
Where it stands, class by class
29 classes, grouped by the 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 permitted, not listed in the rules Our reading, not a rule we can quote at you. This class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list.
No rule, this is an open class Our reading, not a rule we can quote at you. This class carries no stock clause at all, so anything unlisted appears to be open. The rulebook does not say so in terms.
OEM part required 1 class
Must remain OEM and interchangeable between WaveRunner models, with vacuum fittings, upgraded throttle body spacers and ribbon deletes permitted. · DD.1
OEM part required 1 class
Must remain OEM. Vacuum fittings and ribbon deletes permitted. · DD.2
OEM part required 1 class
Must remain OEM. Vacuum fittings, spacers, ribbon deletes permitted. · DD.3
Not permitted, not listed in the rules 15 classes
On a closed list an unlisted modification is not permitted. · A.2.2, J.1
Legal, within limits 1 class
Ribbon delete permitted where the ribbon is the OEM flame-arresting device, provided airflow is not increased. Yamaha SVHO: any OEM Yamaha manifold, plastic may be backdated to metal, ribbon delete on both. Sea-Doo 300 and 325: stock manifold required, RIBBON DELETE NOT PERMITTED. · W.3.5
Legal 2 classes
Aftermarket permitted.
- Drag, Sea-Doo Spec · DD.4
- Drag, Super Stock · DD.5
Legal 1 class
Two-stroke entries: Aftermarket permitted. · P.2.4
No rule, this is an open class 3 classes
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.
- Drag, 2 Stroke Unlimited · DD.12
- Drag, Stand Up Unlimited · DD.10
- Drag, Unlimited · DD.6
No rule, this is an open class 1 class
No restriction in section CC, and CC.1 permits any modification it does not restrict.
- Freestyle · CC
Aftermarket intake manifold: 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 · signed checks on parts the shop sells.
Fuel · two and four stroke · legal outright in 4 of 29