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Aftermarket exhaust manifold / head pipe

IJSBA · Exhaust

Aftermarket exhaust manifold / head pipe

Usually sold with the chamber but governed by the same class rules.

Where it stands, class by class

20 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 1 class

No exhaust section appears in RRL at all.

The rules do not say 1 class

Four-stroke exhaust is genuinely not addressed in RAL. Resolve via RAL.1.1 inheritance from Stock.

Legal, within limits 1 class

Exhaust manifolds with previously drilled or tapped holes may be used if the holes are filled or capped. The manifold OUTLET may not be modified. · FSKL.3.6

Legal, within limits 1 class

Four-stroke: previously drilled or tapped manifolds may be used if capped; flanges may be removed. · RAS.3.8

Legal, within limits 1 class

Model-specific.

  • Sport Spec · none - this document uses ALL-CAPS section headings, not numbered rules

Legal, within limits 1 class

Only the drilled/tapped-hole allowance. · SKM.3.9, SKM.4.9

Legal 1 class

The exhaust system may be aftermarket providing a hazard is not created. · RSS.3.13

Aftermarket exhaust manifold / head pipe: 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.

Exhaust · two and four stroke · legal outright in 15 of 20

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BaddJet Class Legality