are these the same, just different brand??

http://www.jegs.com/webapp/wcs/store...0002_761468_-1

http://www.jegs.com/webapp/wcs/store...0002_757868_-1

Also, do i need some kind of harness or something? or do those come with cai's?

• 90mm Mass air 90MM Lightning Mass Air

• Harness 90MM Mass Air Harness <--- not sure what that is

 

Here, get this for $79 bucks. Includes the sensor
http://www.buyfordracing.com/shop/pr...roducts_id=504

Then go here and get either the do it yourself or the plug and play pigtail adaptor.
http://www.blueovalchips.com/index.p...mp;prevstart=0

 

If you need a bigger maf, just get the C&L racer intake, which includes the larger maf as well as all the piping and it plugs in directly to the OEM harness.

Don't forget you will need a special tune for a non-standard MAF. You can't just plug it in and go.