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Description
AR1-HDR4 - HD/Race Rigid 4 PadHD Race Rigid 4 Pad Clutch Kit Specifications: Item Description: HD Race Rigid 4 Pad Product Weight (lbs.): 9. 9 Torque Capacity (ft lbs.): 330 Torque Capacity Over OE: 73% Disc Material: Ceramic Clutch Disc Diameter (Inches): 8. 4 Clutch Disc Diameter (Millimeters): 214 Input Shaft Diameter (inches): 1. 03125 Pressure Plate Type: Heavy Duty Warranty: 12 MonthsDescription: The AR1 HDR4 kit features ACT's most popular Heavy Duty pressure plate. ACT
HD/Race Rigid 4 Pad Clutch Kit �Specifications:
- Item Description: HD/Race Rigid 4 Pad
- Product Weight (lbs.): 9.9
- Torque Capacity (ft/lbs.): 330
- Torque Capacity Over OE: 73%
- Disc Material: Ceramic
- Clutch Disc Diameter (Inches): 8.4
- Clutch Disc Diameter (Millimeters): 214
- Input Shaft Diameter (inches): 1.03125
- Pressure Plate Type: Heavy Duty
- Warranty: 12 Months
Description:
The AR1-HDR4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use an exclusive diaphragm design to increase clamp load, reduce deflection, and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad rigid race discs are made with high-quality ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines.
Features:
- Feel: Light to moderate pedal effort, aggressive engagement, increased gear rattle
- Life: Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear
- Quality: Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
- Recommended Use: Recommended for race use only
- ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability
Vehicle Fitment:
- Fitment Info: Application - Engine
| 2002 Acura RSX Base | 2.0 L4 GAS FI 1998cc |
| 2002 Acura RSX Type-S | 2.0 L4 GAS FI 1998cc |
| 2002 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2002 Honda Civic SiR | 2.0 L4 GAS FI 1998cc |
| 2003 Acura RSX Base | 2.0 L4 GAS FI 1998cc |
| 2003 Acura RSX Type-S | 2.0 L4 GAS FI 1998cc |
| 2003 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2003 Honda Civic SiR | 2.0 L4 GAS FI 1998cc |
| 2004 Acura RSX Base | 2.0 L4 GAS FI 1998cc |
| 2004 Acura RSX Type-S | 2.0 L4 GAS FI 1998cc |
| 2004 Acura TSX Base | 2.4 L4 GAS FI 2354cc |
| 2004 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2004 Honda Civic SiR | 2.0 L4 GAS FI 1998cc |
| 2005 Acura RSX Base | 2.0 L4 GAS FI 1998cc |
| 2005 Acura RSX Type-S | 2.0 L4 GAS FI 1998cc |
| 2005 Acura TSX Base | 2.4 L4 GAS FI 2354cc |
| 2005 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2006 Acura RSX Base | 2.0 L4 GAS FI 1998cc |
| 2006 Acura RSX Type-S | 2.0 L4 GAS FI 1998cc |
| 2006 Acura TSX Base | 2.4 L4 GAS FI 2354cc |
| 2006 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2007 Acura TSX Base | 2.4 L4 GAS FI 2354cc |
| 2007 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2008 Acura TSX Base | 2.4 L4 GAS FI 2354cc |
| 2008 Honda Civic MUGEN Si | 2.0 L4 GAS FI 1998cc |
| 2008 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2009 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2010 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
| 2011 Honda Civic Si | 2.0 L4 GAS FI 1998cc |
PROP 65 WARNING:
This product can expose you to chemicals including carbon black, glass wool fibers, and silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Well made, light fabric. Waist doesn't roll.
These bamboo underwear really do keep you cool.
They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me.
They are comfortable to wear, washed and dried easily.
The material has some stretch to it, but not a lot.
Well made, no stray strings. Perfect fit for me.
Just what I was looking for.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 31, 2026
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
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