Cliff notes

a 7cm Exhaust housing 20G w/ 15 degree clip will build positive boost under 3k, and hit 26-28 psi at about 3500, there are a billion other variations of the 20G, THAT is the one you want, its the standard Buschur Racing 20G that brought the first DSM to a 10 second time slip, no nitrous, its very streetable, very quick to spool, very powerful, and violent