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Hey guys i have just bought a 92 indy 500SP EFI. I waqs wondering what is the black hose comming out the side of the air box that doesnt seem to go to anything its about 1 -2" in diameter if i remember right. What does this hose do?
 

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It helps the airflow. For some reason the EFI's struggle to get enough air to the mag side cylinder so they added that hose. The reason it's not just a hole is because they didn't want to ingest hot air.
 
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