Some backstory....pulled my full Flowmaster kit off a car I wrecked and bent the firewall. When I did that, the control arm kicked back and dented one of the 4 cats on the CA legal kit. I cut the cat off to remove the exhaust which is going on a new car. I plan to cut off the cat and just run the two down by the X-pipe (probably get rid of those later too). So when talking removing the smog stuff, everyone mentioned a smog pump delete pulley, etc....what's to stop me from running a shorter belt and no cats? The valve up on the passenger side is one way so it won't leak, am I missing something here? Why spend the money on the pump delete?