Hello. Going old school with the 1G venom intake. I’m trying to figure out what fittings I need for the 4 ports on the back. The original brake booster line fits, but I can’t really find what the thread pitch is in there. Using my thread checker tool, I’ve found a .9 thread pitch fits on the smaller three, while a 1.5 fits on the others. I’m not sure the diameter of the fittings though. Thanks

Try 1/8 NPT for the 3 small ports and 3/8 NPT for the big port. (The brake booster fitting from intake manifold enters to a NPT female port but it does not seal properly)

DSMPT said:

Try 1/8 NPT for the 3 small ports and 3/8 NPT for the big port. (The brake booster fitting from intake manifold enters to a NTP female port but it does not seal properly)

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Thanks I’ll give that a shot

You need to buy a new fitting for the brake booster. Stock is BSPT and doesn't have the same thread pitch as NPT. That's why you're having issues.

I got it to work. All found at Home Depot for like $8.