because stock arms suck... limited travel... u will get a smoother ride and wider stance wit new arms... if u get wider then stock... some ppl jus make a lighter stock style... more for drag racing....ur riding style should be easy to chose a arm for... most go wit +2+1... as that means it will be plus 2 wider than stock... and 1plus forward... than stock... hope i helped....
thats a j-arm front... easy to spot... cus the upper arm is a j shape... only on 87-89 models....ok for most... but extream whoops and jumps fucks them up....
a-arms are easy to spot... as upper arm is in shape of an "A"..... and much stronger... been on all models since 90...
and a shot of a sexy shee wit aftermarket fronts...
DiSkOe*1