Thats what I did, I kept the stocker for smog checks here in Idaho, and for "just in case".

Its a reasonably priced mod for what it does. I got mine from Bob Wagner. And it only took my 5 thumbs 30 minutes to change it.

I've tried just about everything out there. Honestly. I've changed injectors 6 times, (actually Rick Harvey changed them..Great guy.) turbos 3 times, and boxes twice. This is the first mod I've seen that worked right out of the box, with no fiddling.

It gives what my TST box can't. Bottom end power. It does blow a nice big cloud if you stomp on it. And it will spin your tires if thats your thing. It don't lack for wheelspin horsepower.