[psfracer]

Go with the Zex system for no other reason then they make a kit specifically for the mustang....it was so easy to put in it barely took me 4 hours. It is a wet system that uses 1 shark nozzle in the air intake tube. Adjustable from 75-175. When I got the car dynotuned, at 950 psi the kit delivered to the rear wheels 101 hp and 132 more ft-lbs of torque on the 100 hp setting. Now I run the 125hp setting with a SCT nitrous tune and Autolite HT0 plugs, which are 1 heat range colder. The kit also includes an adaptor to get fuel from off of the fuel rail. Also, the system has an arming switch, but also a wire that runs off of the TPS. Once armed, the system comes on automatically when you floor it. The system has worked flawlessly for me so far, with many passes at the track. You can see all of this in the picture attached....

 

[psfracer]

I agree with 5twenty, seeing how you both have 5 speed manuals.
But N20 and autos are a match made in heaven, and I have found that N20 in first gear gives you the most benefit (as far as et's)....just as long as you can get the power to the ground. With the autos 3.22 first gear ratio , a stock torque converter that already flashes to 2200rpm, and 4.10s, you are pretty much over 2500 rpm instantly. With DR's / 4.10's, with an auto, my best 60' is now a 1.673 and I am consistently below 1.70.

I really don't know how you guys do it with a manual. I would think 5twenty's setup would be a really good idea.