LT1 WS6 Airbox owners come in
#4
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I just bought some 1/2 inc vacuum hose about 3 inches long and a iron plug from home depot. Put a zip tie or a band clamp on it. Looks ghetto but no leaks and it cost about 2 bucks.
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when i bought my airbox it had a cap on the air hose port. the hose i used to extend my AIR hose is 3/4. i'm 100% sure of this as i just checked a 1 foot long section leftover from when i added my airbox. I'd think you could get a 3/4 cap like the one i had. unfortunately i think i threw mine away or it was in the box that i sent the old intake stuff in when i sold it so i can't give it to you. I suppose a 5/8 might work if it will slip on there. The one i had was really tight so maybe it was actually a 5/8. the hose itself is 3/4 though.