I personally think your 75 shot is gonna last for about 2 days before you say MMMMOOORRREEE!!!!!!! I had a 100 on my car just to be safe and most of the time I couldnt tell if I was spraying or not, I had to put it on the dyno just to make sure the extra power was even there, it was. I ended up going with a 125 before I said enough with this "dry" crap, I need a real shot. I think you might notice your RPM's climb a hair faster and thats about it.