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Class Legality

IHRA · Fuel

High-pressure fuel line and fittings, IHRA

IHRA answers this part for 29 of its classes. 17 of those answers permit the part outright and 9 permit it with stated conditions, leaving 3 that do not. 3 of the ones that do not are classes we read as open rather than as refusing it. 3 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 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.

What each answer below means

Legal, with conditions
Keep it, but measure it: the rules permit this part only inside stated limits.
Legal
Keep it. The rules permit this part in this class.
No rule, this is an open class
Probably keep it. The class carries no stock clause at all, so anything unlisted appears to be open. The rulebook does not say so in terms, and this is our reading rather than a permission anybody wrote down.

Legal, with conditions 1 class

Replacement lines may not provide any function beyond OE hoses. · W.3.1

Legal, with conditions 1 class

Fuel pressure regulators and upgraded fuel lines are permitted, with the pump itself inside the tank. · DD.3

Legal, with conditions 1 class

Fuel pressure regulators and upgraded fuel lines are permitted, and any type of pump. · DD.4

Legal, with conditions 1 class

SAE J30R9 high-pressure hose. Metal filters on high-pressure lines. Threaded fittings or crimped clamps only. NYLON TIE WRAPS AND STANDARD SCREW CLAMPS NOT ALLOWED on high-pressure lines. · CC.3.2

Legal, with conditions 1 class

High-pressure lines must meet SAE J30R9. Metal filters only on the high-pressure side. · K.4.2

Legal, with conditions 1 class

SAE J30R9 on high-pressure. A.N. threaded or equivalent fittings with non-removable crimped clamps. Hose clamps and tie wraps NOT allowed. Metal filters only on high-pressure. · V.3.1

Legal, with conditions 1 class

SAE J30R9 required. Metal filters on the high-pressure side. · X.3.5

Legal 1 class

J.7 names spark plugs, wiring, hoses and clamps as replaceable with aftermarket options outright, which overrides the closed-list default. The general J.7 allowance is recorded on the spark plugs, wiring, hoses and clamps row; this row exists separately for the fittings. · J.7

What we corrected here, and when

  • Four-Stroke Ski Lites. Corrected 2026-10-02: the Four-Stroke Ski Lites row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Runabout GP2. Corrected 2026-10-02: the Runabout GP2 row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Runabout GP3. Corrected 2026-10-02: the Runabout GP3 row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Runabout Limited. Corrected 2026-10-02: the Runabout Limited row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Runabout Lites. Corrected 2026-10-02: the Runabout Lites row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Ski 1100 Modified. Corrected 2026-10-02: the Ski 1100 Modified row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Ski 1500 Modified. Corrected 2026-10-02: the Ski 1500 Modified row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Ski GP2. Corrected 2026-10-02: the Ski GP2 row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Ski GP3. Corrected 2026-10-02: the Ski GP3 row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Ski Limited. Corrected 2026-10-02: the Ski Limited row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Ski Lites. Corrected 2026-09-21: this row had read the closed-list default, against a general rule that names these parts outright.
  • Ski Vintage. Corrected 2026-10-02: the Ski Vintage row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • Sport Spec. Corrected 2026-10-02: the Sport Spec row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.
  • X2 Vintage. Corrected 2026-10-02: the X2 Vintage row read the closed-list default and refused a fuel hose, which J.7 allows in every class; until 2026-10-31 this line wrongly excepted the drag section, where J.7 applies too.

High-pressure fuel line and fittings: 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.

Fuel · two and four stroke · legal in 26 of 29 answered, 9 with conditions

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