In 2004 I had a piggy-back chip soldered onto the ECU in the Red Jett by ChipTorque, Gold Coast. The dude that runs the show is or was Lachlan Riddel.
https://www.chiptorque.com.au
Set up for 98RON, etc, with it's new cams, etc. Had a retune some three years later 2007 and gained an additional 5 kw over last.
So I think back then in 2004, I got a good deal for a SR20DE. They actually used Tomei Cam settings and then went from there on the Jim Wolfe cams.
However, these days, there is a plethora of dodgy chip deals.
Check this one out:
https://www.youtube.com/watch?v=VGtImIP6j3A
Cheers.