TeraFlex Alpine RT (Rogue-Trail) Suspension Systems build on the capable Alpine Cross-Trail CT Suspension Systems. Built with top-of-the-line components, this 4" lift is one of the most versatile and popular systems on the road today. The Alpine RT4 system IR Control Arms set the benchmark for today's long arm suspension systems. This kit includes an adjustable IR Front Track Bar and Front/Rear Track Bar Brackets for maximum adjustability that makes them a perfect mix of performance and driving comfort.

The Adjustable IR Long Control Arms tune caster angle, anti-squat geometry, and the tire position. Working with the Front and Rear Track Bar Brackets, the result is improved steering response, optimized roll center of the Jeep, and unsurpassed handling due to reduced body roll. Additionally, the Alpine IR Long Control Arms feature TeraFlex's new IR (Independent Rotation) Bushings. These are newly innovative bushings that remove bushing bind during compression of the suspension due to changes in the road. This results in a noticeable ride improvement as well as increased suspension articulation, minimized brake dive / acceleration squat! The IR Bushings also reduce bind during droop, for less bushing load during articulation. On 4-6” lifts, Alpine Long Arm Brackets reposition frame-end control arm mounting points to restore near factory orientation to reduce bushing stress during extreme droop as well as shock load transferred through the Alpine IR Long Control Arms.

TeraFlex suspension systems provide reduced noise, vibration, and harshness (NVH) compared to other kits. Kit comes with Falcon Shocks Series 3.3 performance shocks. We recommend Falcon shock absorbers for superior performance. Falcon shocks and TeraFlex coil springs have been designed to work together to improve both compression and rebound for optimal vehicle stability

4” Alpine RT4 Suspension System

Features and Benefits:

• Dependable performance w/ zero worries
• Positive, responsive handling w/ reduced noise, vibration, & harshness (NVH)
• Alpine Adjustable Control Arms balance front caster & pinion angles, as well as optimize rear angles for 3-6” lift kits
• High-quality, maintenance-free IR Bushings allow unrestricted rotation during droop for less overall bind during articulation as well as improved ride quality
• Adjustable Alpine IR Front Track Bar and Front (4”+) and Rear Track Bar Brackets improve steering response, center axles to optimize vehicle roll center, and reduce body roll for unsurpassed handling
• TeraFlex SpeedBump Front & Falcon Progressive Rear Bump Stops provide progressive compression during high-speed suspension movement
• Full range of movement for off-road flex & articulation
• Requires aftermarket wheels w/ 4.5” backspacing or less – or Offset Wheel Adapters (# 1055000) for stock wheels. NOT INCLUDED
• May require driveshaft modifications. See the TeraFlex Rzeppa High Angle CV Kit (# 1744014)
• Max Tire Size 37”
• Welding Required
• Requires Cutting
• Alignment required
• TeraFlex Lifetime Warranty
• Comes with Falcon 3.3 Series Shocks

Kit Includes:

• 4” Lift Coil Springs (JK4 Front: # 1853402; JK4 Rear: # 1854402)
• 0.5" Lift Coil Spring Spacers (Front x 2: 1953100; Rear x 2: # 1954105)
• Alpine Long IR Control Arm & Bracket Kit – 8-Arm (3-6” Lift) (# 1315011)
• HD Forged Adjustable Front Track Bar (0-6” Lift) (# 1753418)
• HD Forged Adjustable Rear Track Bar (0-6” Lift) (# 1754418)
• Front Track Bar Bracket Gusset (# 4951800)
• Rear Track Bar Axle Bracket Kit (3-6” Lift) (# 1954777)
• Speedbump & Progressive Bump Stop Kit (# 1958250)
• 1.25” SpeedBump Front Lower Bump Stop Pad Kit (# 1467125)
• 0.75” SpeedBump Rear Lower Bump Stop Strike Pad Kit (x 3: # 1954600)
• 10” Front Sway Bar Quick Disconnect Kit (3-4” Lift) (# 1753000)
• 12.25” Rear Sway Bar Link Kit (3-4” Lift) (# 1754500)
• 26” Front Brake Line Kit (# 4353310)
• 30” Rear Brake Line Kit (# 4350310)
• Front Brake Line Anchor Kit (# 1101255)
• Exhaust Spacer Kit (# 2610000)
• Falcon Series 3.3 Fast Adjust Piggyback Shocks (3-4.5” Lift) (JK4: # 03-01-33-400-253)
• All necessary hardware

TeraFlex Part #: 1334033

Notes: Fits 4 Door JK Unlimited Only