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I’ve read all the posts on this subject and feel there’s got to be better info out there in 2019.
Would appreciate anyone’s help.
My oem booster had vac leak. 30yrs old..it had a good life I guess.
Replaced with an oriellys China part for 240sx application even tho I knew that it would most likely fail early, I needed something now.. it lasted 4 days. Complete failure. Stiff pedal, no brakes. Ridiculous. Luckily they have warranty and can get my money back. But availability is horrible. Not one store anywhere has an s13 booster available.
I did find almost all of my caliper slide pins were seized... could have caused the booster failure? But it’s all fixed up now.

I figure there has to be some other cars that use a brake booster that fits? And has more availability?
Going to call around on s14 boosters today.
Thanks