Wow! Good info! Thank you!
Also, good to know my IS is a 49'er (SC410).
doesn't matter, all '98 49 state have calif cams, I checked mine, I have a 49 state '98. according to the last dyno runs done by magazines of '99s I believe they all have calif cams also. easy to take the left valve cover off, manually turn the engine over to see the stamp. the only way to know.