Toyota Obd

How can i add HP to my 1999 toyota solara sle v6?

I know stuff like cold air intake, a good ehaust, but what else? Also possibly to increse gas mileage?

you might consider one or the other of these (depending on which is more important to you - power or fuel economy)

http://www.partsgeek.com/catalog/1999/toyota/solara/engine_electrical/computer_chip_programmer.html

http://cgi.ebay.com/ebaymotors/1999-Toyota-Solara-OBD-Fuel-Gas-Saver-ECU-Chip-/220640077485

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