Hey, i run a zex's dry 75 shot on my jdm b20 with header intake exhaust and skunk 2 intake man. i put it on the dyno where i used to work and i put down 167HP, and 16? T untuned.. my air fuels were so dangerious. like 18.0's and up. so i added a safc and tunned it and gained another 30 hp. its a totally different car. definitly get it tunned or your motors not going to last. but if its tuned man dont worry about anything. its all about getting enough fuel.