OK, I can speak from experience on this one. I had a 50 shot of nos(dry) on my na, it also has a Toda Racing 7lbs flywheel with custom rps clutch, full tuned and stepped exhaust, magnecor 8.5, ngk race plugs and an intake. And this car was a kick in the tail. I easily outran full greddy turbo civics, 95+ mustang gt's(some modded), and a host of other imports and domestics. All while sitting on 17 inch subzeros, it was a nice boost over stock and it would supreise many many people. It's not really hard to install,takes a couple hours. Just make sure that you stay under a 65 shot if you're in a na, the rule is half your stock horsepower is the maximum shot you can run. So a na with 133hp comes out to around 65 shot of nos and thats on a decent motor. I would not run nos on a motor that has issues. Hope this helps.