inner deletes to J-bars are not for weight savings, more so to fit crazy exhaust or run coil overs and have a top coil mount. But since you asked....I just happen to have a set of inners sent to me and they weigh ~12 lbs a side. I bet the J-bar weighs more than 12 lbs.
J bars to tie to a roll cage and stiffen it up for drag racing isnt for weight reduction, its to stiffen up the front end, and open it up for ease of maintenance on a drag car.
