I normally don't post a question like this, but my Brat sits in the garage at home, and I am at work 8 miles away, and I planned on getting a new radiator hose at the store today on my lunch and a new brake booster hose or a section for it. Yes, I brought the Radiator hose, but forgot to take off the booster line to bring with, and forgot to measure hose diameter inside dimensions.

 

My question: Can someone tell me the correct Brake Booster Vaccuum hose size that come off the engine, and hooks into a hose connector fastened to the Driver side strut tower, all for a 85 Brat GL. I need to put a longer hose extender on for the brake booster after my lift install. thanks

that could be a tough one to get, as it's thicker than a normal vac hose so it doesn't collapse....

 

looking at a ruler, I'd say OD is about 5/8" and the ID is 1/4" or 5/16"

 

any spares on the Ej w/hole?

I will just buy a couple short sections of hose different sizes you have listed and give it a try tonight. thanks.