P10 SR20 Decat Pipe

Looking for a P10 SR20 Decat pipe in 2.5 or 3"

Thanks.

Do you know which length is needed for a P10?

Most of the Decat are 31 cmts long but I don't know the exact size and I cannot measure it since my car doesn't have one. I've bought a bnib Fujitsubo wich is designed for cat, but of course I won't fit a cat if my car doesn't have it.