OEM part required 2 classes
Stock except water fittings.
- Drag, Yamaha Pro Stock · DD.1
- Drag, Sea-Doo Pro Stock · DD.2
IHRA · Driveline
Aftermarket pump housing and stator vanes
IHRA answers this part for 29 of its classes. 14 of those answers are permissions, with or without limits attached, and 15 are not. 12 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. · W.5
Not permitted, not listed in the rules 8 classes
On a closed list an unlisted modification is not permitted. · A.2.2, J.1
Legal, within limits 3 classes
The pump and nozzle assembly may extend no more than 50 mm beyond OEM.
- Runabout Limited · BB.9.3
- X2 Vintage · T.5.3
- Ski GP · K.7.2
Legal, within limits 2 classes
Aftermarket permitted, and the visibility spout must be removed or sealed.
- Ski 1100 Modified · R.5.3
- Ski 1500 Modified · Q.5.3
Legal, within limits 1 class
Model-dependent. Must remain OEM. U.5.3 Sea-Doo HX may use OEM plastic housings retaining the small-diameter hub and vane count. Polaris Hurricane may upgrade to the factory-superseded six-vein pump. Kawasaki X2 may use aftermarket pump cones, with pump nozzle extension limited to 50 mm. · U.5.3
Legal, within limits 1 class
On two-stroke entries the pump and nozzle assembly may extend no more than 50 mm beyond OEM. · P.2.6
Legal, within limits 1 class
Titanium impeller housings and stator vane assemblies allowed. Limits: max extension from transom 139.7 mm. · S.5.2
Legal, within limits 1 class
Limits: max nozzle extension 50 mm. · V.8.3
Legal, within limits 1 class
Limits: max assembly extension 50 mm. · X.6.4
Legal 4 classes
Aftermarket permitted.
- Drag, Sea-Doo vs Sea-Doo · DD.11
- Drag, Yamaha Spec · DD.3
- Drag, Sea-Doo Spec · DD.4
- Drag, Super Stock · DD.5
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 pump housing and stator vanes: 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.
Driveline · two and four stroke · legal outright in 14 of 29