04 forester xt
04 fxt 5spd. wot 1-2-3 gear pulls.its normal during regular driving,but when i go from 1st to 2nd at almost wot ,it bucks forward and seems to bog for a second before it goes . ive done group n tranny mount, outrigger bushings and xmemer bushings . im thinking group n motor mounts or a good tune should help it alot. could it be spark plugs ? ive had it for 6 months(82k miles) ive changed out fluids and fuel filter and have greddy upipe. i havent changed plugs so they could be the original ones.