IJSBA · Exhaust

Stinger reducer insert + cooling line

The one exhaust part that is legal in the tightest two-stroke stock classes.

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This is one body's answer, not the sport's. You are bound by whichever body sanctions the event you enter, and where both govern you, you are held to the stricter of the two. The differences are set out in the rulebook comparison.

This is the only pipe-adjacent SKU that sells into Ski Lites legally.

Where it stands, class by class

12 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.

Not permitted, not listed in the rules 4 classes

Not listed in this class document. Illegal under the closed-list principle.

• Vintage Ski Limited · VSKL
• Runabout Naturally Aspirated · RNA
• Sport Spec · none - this document uses ALL-CAPS section headings, not numbered rules
• Runabout Limited · RAL

The rules do not say 6 classes

Not addressed in this class document.

• Vintage SC · VSC
• Vintage X2 · VX2
• Vintage Ski · VSK
• Freestyle · FREST
• Ski Grand Prix · SKGP
• Sport GP · SPGP

Legal 1 class

A stinger diameter reduction insert is permitted. · RAS.4.5

• Runabout Stock

Legal 1 class

An insert in the stinger portion to reduce inside diameter, plus cooling lines added to the insert or stinger. · SKL.3.6

• Ski Lites

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Stinger reducer insert + cooling line: 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 IJSBA class · where the rulebooks differ · signed checks on parts the shop sells.