The hole on the right side of the air box (as viewed from the rear of the car) can be plugged as you are using a later model CIS.
The hole is under the filter so if it isn't plugged you will get unfiltered air. The hole is a leftover from earlier CIS versions.
For reference and clarification the hole you are talking about is viewed from the inside of the air box by removing the air box straps, the cover and the filter. It is a small 5/8" hole that is flush with the inside of the box and protrudes about 1.2" to the outside in order for a hose to be attached.
Plug it.
Your first picture shows where the top hose from the oil filler neck gets attached, this is the vent hose from the filler neck to the Air boot.
Your second picture shows that you have the wrong hose, for your application. You need to remove the old hose and replace it with a later hose. Plug the hole in the airbox and vent the tank to the top air boot.
In other word it is the same thing as Bruce (Flat6pac) stated above.
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78’ SC 911 Targa - 3.2SS, PMO 46, M&K 2/2 1 5/8” HEADERS, 123 DIST, PORTERFIELD R4-S PADS, KR75 CAMS, REBEL RACING BUSHINGS, KONI CLASSICS
Last edited by snbush67; 04-08-2010 at 01:34 PM..
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