http://www.automotosports.com/dsm_electronics.asp

theres the site. what is it and what is it for?

It's another reasonably priced wideband kit. The only thing I don't like about it is there are no outputs on it for connecting to a standalone ecu or a narrowband output simulation for a stock ecu. In other words this one doesn't replace the factory narrowband sensor and work inline with the ecu, it runs the wideband seperate. For that price there are a couple better options like the plx, zietronix, or techedge units.

um...... whats a wideband used for?

It tells you what your air/fuel ratio is, more accurately than the stock narrow band O2 sensor.

gotcha, but why does it cost so much? what about those a/f gauges?

Because it works. AF gauges are useless.

Because it works. AF gauges are useless. [/b][/quote]
so do you use it to log/get data so you can tune?

so do you use it to log/get data so you can tune? [/b][/quote]
Correcto.

gotcha

seriously spend s few hours/days/weeks/months reading NABR. Don't post, just read.