Our 3.5 X-Factor System has all of the benefits of our Flex System but includes upper and lower control arms, front and rear. Our 3.5 systems allow you to run up to 33 tires and offers the ultimate adjustability. The system includes sport tuned triple rate coil springs front and rear for a excellent on road ride. Double adjustable lower control arms with a Monster Krawler Joint at the axle connection to allow a huge amount of flex and our vibration isolating Pro Flex joint at the frame. Front adjustable sway bar disconnects improve the off-road ability even further. Front extended stainless steel brake lines allow for greater axle travel and also firm up the brake system. The rear track bar bracket, which is made from a durable 3/16 thick laser cut steel, helps you easily recenter the rear axle. This is the most versatile system on the market today for the Wrangler TJ owner wanting to run 33 tall tires and improve off-road ability. System Benefits: Excellent Highway Ride and Handling Improved Off-Road Ability Complete Bolt In System Allows for 33 Tires Double Adjustable Front Lower Control Arms Front Quick Sway Bar Disconnects Front Long Travel Stainless Steel Brake Lines Extended Rear Sway Bar Links T Case Drop Kit for Drive Line Angle Correction Limited Lifetime Warranty Upgradeable to Any Other System System Includes: (4) Sport tuned coil springs(1) Front high misalignment/adjustable track bar(4) Adjustable lower control arms(4) Double adjustable upper control arms(2) Adjustable front sway bar quick disconnects(2) Front sway bar link straps(2) Front long travel stainless steel brake lines(1) Rear track bar relocation bracket(2) Rear extended sway bar links * Includes all hardware and detailed instructions. NOTES! * Requires a transfer case drop kit, or a C.V. Driveshaft Conversion, or a SYE with C.V. Driveshaft Conversion ** 2003 TJ's equipped with 4 speed automatics will require removal of the factory automatic transmission skid plate if so equipped to allow for proper front driveshaft travel *** Choose your bump stop lengths after you choose your wheel/tire and fender combination. **** Typical wheel fitment for a 12.5 wide tire is a 15 x 8 with 3 3/4 of back spacing.