Thanks, I bought it used, cleaned it up, and had the whole thing thermocoated black at a local shop. Already got Ramair v.2 installed. O2 is already plugged, and I'll trace the O2 sensor wires up and remove that cleanly.
@HansO kindly sent me a tune for the whole thing once the exhaust is installed.
Thanks for the advice. I've tried calling Carpenter a few times for new springs, but haven't had anyone return my voicemails. I'll keep trying...
EDIT: Just spoke to someone at Carpenter who said he'd send the replacement springs out free of charge. Nice guy!