Yeah you definitely have springs on there that aren't stock.
I couldn't see if you had stock control arms or not. Pictures of those would help, as well as if they are adjustable.
As for the exhaust spacers, lots of people use them but I personally hate them. A pain to install especially to get right. And then they still might cause your exhaust crossover to hit the skid plate.
I'd rather kill two birds with one stone and do the driveshaft. Personally I like the tatton rzeppa shaft with a teraflex high angle joint, lets you run how much caster you want without driveline vibrations.
Other option for not much cheaper is a relocated y pipe
•|||||||• 2015 Unlimited Sport S Baja Yellow
Auto / 4.56 Gears / ARB Front, Auburn Ected Rear Locker & LSD / G2 Core 44 35 Spline Axles / Alpine 9-Speakers & Sub / MC 3.5" w 6pak shocks / 37" KM3s on Method 105 Beadlocks