ACT HD/Perf Street Sprung Clutch Kit Jeep Wrangler JL & Gladiator JT 3.6L w/ Pro-Mass Flywheel | JP6-HDSS

Overview

The ACT Heavy Duty Off-Road Performance Street Sprung Clutch Kit (JP6-HDSS) is the ultimate clutch upgrade for 2018–2026 Jeep Wrangler JL and 2020–2024 Jeep Gladiator JT owners who demand more from their 3.6L Pentastar drivetrain. Engineered by Advanced Clutch Technology — a brand with deep roots in motorsport — this complete kit delivers a massive 32% increase in torque capacity over OEM (479 ft-lbs) while preserving the smooth, streetable engagement feel Jeep drivers expect on the daily commute and the trail. Whether you're rock crawling, towing, or pushing hard on the highway, the JP6-HDSS is built to keep up without compromise.

Key Features & Benefits

• 32% Greater Torque Capacity Over OEM — Rated at 479 ft-lbs, this kit handles the demands of lifted, regeared, or modified Jeeps that have outgrown their factory clutch.
• ACT Exclusive Diaphragm Design — Increases clamp load and reduces deflection to maximize clutch life; all diaphragms undergo a four-stage heat-treating process for unparalleled performance and durability.
• Premium Organic Friction Disc — Steel-backed, full-face organic friction material delivers exceptional wear resistance, improved heat capacity, and reduced fade — ideal for spirited street and off-road use.
• ACT Pro-Mass Chromoly Flywheel Included — The precision-balanced Pro-Mass flywheel (40.8 lbs) replicates OEM-like throttle response and engine rev characteristics so there's no sacrifice in daily drivability.
• Precision Computer Spin Balanced to ±0.25 oz-in — Tighter than OEM production tolerances (typically ±0.50 oz-in), ensuring vibration-free, smooth operation across the entire RPM range.
• 100% Clamp Load Tested — Every pressure plate is individually tested and dynamically balanced before leaving the factory. Key contact areas are induction-hardened for extended service life.
• Light-to-Moderate Pedal Effort — Engineered for real-world street comfort with smooth, positive engagement and OE-to-mild gear rattle — no harsh, race-car pedal feel.
• Direct-Fit Conversion Kit — Designed specifically for the JL/JT 21-spline input shaft. No drilling required. All hardware included for a complete installation.
• Made in the USA — Built with premium bearings, precision-machined castings, and heat-treated stampings for long-term reliability.
• CARB Compliant — Meets California Air Resources Board (CARB) standards; 50-state legal.

What's Included

• (1) ACT Heavy Duty Pressure Plate — Part #J014
• (1) Performance Street Sprung Organic Clutch Disc — Part #3001829 (11"/280mm, 21-spline, full-face, sprung hub)
• (1) ACT Pro-Mass Chromoly Flywheel — Part #601325 (127-tooth ring gear, 8-bolt pattern)
• (1) Clutch Release/Throwout Bearing — Part #RB018
• (1) Clutch Alignment Tool — Part #AT71
• Flywheel Bolts — M10-1.00 x 40mm (set of 8)
• Pressure Plate Bolts — M8-1.25 x 16mm
• Installation Grease
• ACT Installation Instructions

Specifications

Manufacturer Part Number	JP6-HDSS
UPC	842385026875
Torque Capacity	479 ft-lbs
Torque Capacity Over OE	+32%
Clutch Disc Diameter	11 in (280 mm)
Disc Material	Organic (Full Face)
Disc Hub Style	Sprung
Pressure Plate Style	Heavy Duty Diaphragm
Flywheel Type	Pro-Mass (Chromoly Steel)
Flywheel Weight	40.8 lbs
Input Shaft Diameter	1.125 in (1-1/8")
Input Spline Quantity	21
Ring Gear Tooth Count	127-tooth
Flywheel Bolt Quantity	8
Product Weight	62.6 lbs
Country of Origin	United States
CARB Compliant	Yes — 50-State Legal
Warranty	12 Months
Cross-Reference	ACL-JP6-HDSS (Summit Racing), 054-JP6-HDSS (JEGS)

Fitment & Compatibility

The ACT JP6-HDSS is a direct-fit conversion kit engineered exclusively for the Jeep 3.6L Pentastar V6 with a 6-speed manual transmission (Aisin AX-15 / TR6060). It fits the following applications:

• 2018–2026 Jeep Wrangler JL — Sport, Sport S, Sahara, Rubicon, and all sub-trims (Unlimited included)
• 2020–2024 Jeep Gladiator JT — Sport, Sport S, Overland, Mojave, Rubicon, and all sub-trims

Note: This kit requires the use of the included ACT Pro-Mass flywheel (conversion kit). It is not compatible with diesel or automatic transmission variants. Verify your transmission type before ordering. Not compatible with the 2.0L turbocharged Wrangler.

Is this clutch CARB compliant? Yes. The ACT JP6-HDSS meets California Air Resources Board (CARB) standards and is 50-state legal.

Will this increase pedal effort? No significantly. The JP6-HDSS is specifically tuned for light-to-moderate pedal effort, offering smooth, positive engagement that is comparable to OEM feel for everyday driving.

Does this kit work with a lifted Jeep? Yes. This kit is recommended for street and off-road use, making it ideal for modified, lifted, and regeared JL/JT builds that put higher demands on the factory clutch.

Installation

This is a conversion clutch kit that replaces the OEM flywheel and complete clutch assembly. Installation requires transmission removal and is estimated to take approximately 6 hours. No drilling is required and all hardware is included. ACT recommends installation by an experienced, knowledgeable mechanic; professional installation is advised for those without prior clutch or transmission experience. A transmission jack is strongly recommended. After installation, plan for a 300–500 mile break-in period of normal street driving before subjecting the clutch to heavy towing or extreme off-road use. ACT's official step-by-step installation video and PDF instructions are available at advancedclutch.com.