smog ????????

You woun't gain any real HP by removing the smog equipment. The smog pump vents and effectively freewheels at full throttle. Cat converters will eventually fail without a working smog pump. The EGR shuts off at full throttle. Removing the smog equipment only saves less than 15 pounds and the computer keeps spitting codes unless you have a custom chip burned. All in all, not worth the problems it causes.