$480 for DC cat-back, that's from autodynamic.com I've used them before and they are very competitive with their prices and their service was excellent.
For instance, I ordered stuff from them online (never actually spoke to them), then 9 days later my goods arrived...in the UK.
Try them, they are in California too.
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93 VTEC 4WS & TC (JDM)
"and on the seventh day, God created VTEC"