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For the 350z HR. Went back to stock because of the vented hood. Has about 20k miles on it. Hardware, heat shields, tubes, and filters all included. $325 shipped and paypal'ed.
I'll answer for the OP..... that's a matched set for dual intake HR engine, not two singles.
FYI to prospective California buyers: this CAI is now LEGAL for use on pollution controlled vehicles (as of Jan. 7, 2016). While this one (nor any sold from stock currently) will carry the CARB exemption sticker, it is legal and recommend that you print out (and keep with your vehicle registration) a copy of...
State of California
AIR RESOURCES BOARD
EXECUTIVE ORDER D-692-2
...showing its new legality in case you get hassled (doubt it) for it by authorities and/or smog certification places.