Good Quality EMPI Oil bypass/return adaptor for twinport cases.
Use of this item converts the engine to full flow.
This is a clever design which allows the use of a full flow oil system without machining the crankcase. The unit screws into the oil pressure regulating valve aperture (the spring and plunger must be removed) and provides the return route for oil from a full slow pump cover
1300-1600 Twinport
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