yes if anything is over 50" they will bust your balls and make you leave. we took a really small dune buggy and it was like 55 and they made us leave. it was hard fitting it on the trails anyways.
do some research on the 1153-1. tons of big turbo big boost guys running them with now issues. thats what i have on my car. its only seen 24psi though. cometic i'd just throw away. hks probably just paying for the name.