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Drag, Sea-Doo Pro Stock

IHRA · drag

Drag, Sea-Doo Pro Stock

IHRA2026, DD.2. A closed-list class. The craft must stay stock except where the rules allow otherwise, so anything unlisted is not permitted.

Open questions on this class (2)

Places where the rulebook contradicts itself, or where a figure could not be settled. Nothing in this list is decided, and it sits here rather than in a footnote because it is what you would want before spending money.

  • The same DD closed-list problem applies. A bullet list read as an exhaustive permission set leaves most of the craft unaddressed and therefore illegal.
  • This class permits aftermarket camshafts and fuel injectors where the equivalent Yamaha class at DD.1 requires both to be OEM. The two Pro Stock classes are not equivalent and a single Pro Stock answer would be wrong for one of them.

Sections this rulebook does not contain for this class

Confirmed absent by a targeted read rather than merely unnoticed. In a closed-list class an absent article is why a part reads as not permitted; in an open class it is why one reads as open.

  • No class criteria of any kind.
  • No cooling article.
  • No ignition timing article.

What the rules say (65 parts)

32 permitted outright, 19 answered by our reading of the class rather than by a quoted rule, 0 the rules do not settle. Grouped by the answer, because an open class gives one answer to most questions and printing it once per part would say the same sentence forty times.

Not permitted, not listed in the rulesOur 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.

Not legal1 part

Bolts, nuts and washers may not be substituted with titanium unless originally equipped. Locking mechanisms are allowed. J.7

OEM part required1 part

Must remain OEM. Cable-driven bodies may be bored to latest-model specifications. DD.2

OEM part required1 part

No holes are permitted, and any existing hole must be replaced with an OEM uncut panel. DD.2

OEM part required1 part

Modifications permitted, no open holes. Both OEM seats if originally equipped. DD.2

Not permitted, not listed in the rules19 parts

On a closed list an unlisted modification is not permitted. A.2.2, J.1

Legal, within limits1 part

Fuel pressure regulators and upgraded fuel lines are permitted, alongside the single in-tank electric pump. DD.2

Legal, within limits1 part

Gauges may be modified or removed provided no hazard is created and any resulting hole is sealed. Section J permits modification and removal and never addresses adding an aftermarket instrument. J.15

Legal, within limits1 part

Factory compression must be maintained. DD.2

Legal, within limits1 part

Repairs are allowed for a crack or puncture, but only one damaged area affecting one cylinder bank. No other modification. J.11

Legal, within limits1 part

Must meet OEM specifications. Oversized valves NOT allowed. DD.2

Legal, within limits1 part

May be replaced within OEM specifications. J.18.3

Legal, within limits1 part

Replacement trim plates may be used provided they mimic the handling characteristics of the stock plates. J.18.2

Legal, within limits1 part

Braking devices may be disabled for safety, and reverse buckets and trim motors may be removed or modified to disable them, provided no hazard is created. J.18.4

Legal, within limits1 part

The hull may not be split or lightened. DD.2

Legal, within limits1 part

Replacement bumpers and side rails may be used provided they create no hazard. A permanently affixed nose bumper remains required. J.13, I.17

Legal, within limits1 part

May be added to adjust handling. Constant mass only, and no other part may be modified to carry it. J.19

Legal1 part

May be replaced, as may starters and oil injection systems, with the oil injection system removable or disconnectable. J.8

Legal1 part

Grips, throttle and cables may be modified or aftermarket. The bar must be padded at the mounting bracket or the crossbar padded. J.17.1

Legal1 part

Steering shaft, holder, handlebar holder and cables may be aftermarket, and quick-turn modifications are allowed. J.17.2

Legal1 part

The bilge pump may be modified or disconnected and aftermarket bilge draining systems are permitted, provided they create no hazard. J.10

IHRA 2026, DD.2, read from the rulebook on 2026-09-11, not verified by a racer. Read the rule yourself. Every IHRA class · where the rulebooks differ.

This is one class. Every part below also has a page of its own showing where it stands across every class this body runs, and legality by part is the index of them.

65 parts read · 32 permitted outright · 2026 rulebook

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