If you have a 2001, it has roller rockers which other SR20 engines do not have. JWT does not have an S3 or S4 roller rocker cam grind, those are for the 91-99 SR20 engines. There were rumors that JWT is developing a roller rocker cam.
The roller rocker engines dyno pretty well stock anyway (~128hp), so you'd be better off skipping cams and going for intake and header.
I saw a 2001 Sentra SE (same type cams) do about 143 with a Hotshot header and a Place Racing cold air intake and stock ECU.
Don McLaurin
99 G20t