Good Morning all, I picked up a an all original 94' 5.0 Vert last month. I knew the car was very clean and the owner stressed "All Original" and "Never been apart". Anyway, I'm in the process of tuning it up, as it felt kind of doggy. It had the original Cap, Rotor, Coil and Plugs in it. Changing those gave it a HUGE power increase and sounds way better. It just seems to fall flat right about 4K or so. Not missing, just lagging in power. Now, I get it, it's not a high revving engine (my daily driver is a G37, which is polar opposite in power delivery), but I still suspect the 22 year old cats are a bit clogged. Being a Vert, cat-less really isn't an option. I've been in one and it's terrible at stop lights. Man, I'm being long winded. From what I've been able to gather, stock piping is 2.25" right? Any experience with these would be great. Again, I'm 100% Stock.