LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Friend's header install A.I.R question

Old Apr 3, 2010 | 12:47 PM
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Default Friend's header install A.I.R question

We are blocking off the EGR and AIR systems, what size brass caps can I get to block the AIR tubes on his headers, anyone know the size? Help QUICK cause we are working on getting the passenger side header in right now.
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Old Apr 3, 2010 | 01:48 PM
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93-95 use an M22 plug, 96-97 use an M18. You'll need to go to an auto parts store and find a drain plug that fits - hardware stores normally don't carry that thread.
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Old Apr 6, 2010 | 06:58 PM
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I want to cap off my AIR from my pacesetter headers, the threads are on the outside. What size cap do I need?
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Old Apr 7, 2010 | 02:47 PM
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For the headers with a cap, I just took one of my AIR valves to NAPA. He matched it up with a brass pipe cap, it threaded right onto the header nipples.
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