Pay in installments of $136.38 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 4 - Aug 9
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Bilstein 25-287813 B8 8100 Series Shock Absorber (Bypass)Replace the shocks on your Jeep Wrangler JL with the Bilstein 25 287813 8100 Series Shock Absorber from GAP. Bilstein B8 8100 reservoir shock absorbers are a large bore 60mm direct fit solution for lifted trucks and SUVs. Constructed from aerospace quality billet components, the large 60mm ID shock body offers a higher oil volume capacity to control heat while tackling rough road surfaces over long distances. Each B8 8100 offers a unique remote or
Replace the shocks on your Jeep Wrangler JL with the Bilstein 25-287813 8100 Series Shock Absorber from GAP. Bilstein B8 8100 reservoir shock absorbers are a large bore 60mm direct fit solution for lifted trucks and SUVs. Constructed from aerospace quality billet components, the large 60mm ID shock body offers a higher oil volume capacity to control heat while tackling rough road surfaces over long distances. Each B8 8100 offers a unique remote or piggyback reservoir solution for an easy, hassle-free installation. These shock absorbers feature a monotube design for consistent fade free performance and utilize velocity sensitive digressive valve settings which are tuned for each specific application. The large 60mm piston design offers more comfort and control in all driving conditions. The Bilstein B8 8100 will allow you to tame the terrain in comfort.
Specifications:
Part Number: 25-287813
Series: 8100 Series
Position: Front
Quantity Per Vehicle: 1
Finish: Zinc Plated
Reservoir: Yes
Body Design: Bypass Body (Non-Coilover)
Body Diameter: 60mm
Spring Seat Included: No
Adjustable Damping: Double Adjustable - Compression and Rebound
Measurements:
Collapsed Length (IN): 18.11
Extended Length (IN): 29.13
Collapsed Length (MM): 460.0
Extended Length (MM): 740.0
Specifications:
Part Number: 25-287813
Series: 8100 Series
Position: Front
Quantity Per Vehicle: 1
Finish: Zinc Plated
Reservoir: Yes
Body Design: Bypass Body (Non-Coilover)
Body Diameter: 60mm
Spring Seat Included: No
Adjustable Damping: Double Adjustable - Compression and Rebound
Measurements:
Collapsed Length (IN): 18.11
Extended Length (IN): 29.13
Collapsed Length (MM): 460.0
Extended Length (MM): 740.0
WARRANTY INFO:
2 Year
Note: For Front Lifted Height: 3-4.5"; Requires appropriate bump stop extensions and aftermarket driveshaft.
*Lift Height is suggested by mfg. Due to the many different aftermarket suspension systems it is recommended that a measurement is taken for proper application. A pin to eye shock is measured from the base of the stem where the mounting hardware rests to the center of the eyelet. Shock Absorbers sold individually.
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
4.1 ★★★★★
Based on 30 reviews
Sort
Product Reviews
★★★★★ 5
Great fit!
Size: Large, Color: Beige
Most comfy undies THANK YOU!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
★★★★★ 5
This are the best in men’s underwear. Modal fabric is the key.
Color: Black, Size: Small, Color: Black, Size: Small
Well I tried Hanes bikinis small and medium said to be the best seller. Maybe for a young boy but not for me an older man.
Tried numerous others and none fit like these.
The most comfortable of all I tried probably because the waistband being between mid and low and not so wide a fabric and fit the best.
The biggest thing I love about these is the pouch area being just right and the fabric is so soft. Modal is the way to go. Cotton bunches up.
Great quality and price. Can’t go wrong with these. Tried boxer briefs and trunks also and all to high waisted even when advertised as low, and the pouch area were bulkier.
Edited: The solid colors are ok for casual use only but not for sports. The ones with a fancy design are better. Bigger pouch area and a different style waist band.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
Soft, true-fit briefs — great daily comfort, not ideal for workouts
Color: Black, Size: Large
I’ve been wearing these wirarpa modal briefs every day for about a month, and they’ve quickly become my go-to pair for daily wear. I previously owned the same brand’s boxer briefs for over a year, which held up better than any other brand I’ve tried, so I decided to test the brief version this time.
Fit and Comfort
The sizing was spot-on for me. The waistband is soft, not scratchy, and doesn’t dig in — it stays in place without rolling. The leg openings don’t ride up, and everything stays comfortably supported without tight seams in the wrong spots. I’d almost forgotten how briefs feel after years of wearing boxer briefs, but these reminded me why they’re still worth owning.
Fabric and Wearability
The modal material is silky and smooth to the touch. It’s perfect for everyday comfort and casual wear, but not the best choice for sports — it’s not highly moisture-wicking, so I wouldn’t use them for workouts or hot outdoor work.
Durability
After a month of daily washing, there’s no pilling, stretching, or loose stitching at all. If they hold up like my year-old wirarpa boxer briefs, I expect these to last far longer than most big-name brands.
Design Notes
These come neatly rolled in a sealed bag with no odor or chemical smell — a nice touch that shows some quality control.
Bottom Line
If you like a soft, lightweight brief that fits true to size and stays comfortable all day, these are a great value. Go for the boxer briefs if you want more coverage or plan to sweat in them, but for regular daily wear, these hit the mark perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 5, 2025
★★★★★ 5
Soft, lightweight, and comfortable
Color: Black,navy,burgundy,brown, Size: Medium
These briefs are soft, lightweight, and very comfortable for everyday wear. The modal microfiber material has a nice silky feel, and they provide plenty of room without feeling bulky. The fit is true to size, which is always a plus when ordering underwear online. Overall, a comfortable and well-made option if you want something soft and easy to wear all day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
★★★★★ 4
Comfortable and soft
Color: Black, Size: Small
I purchased these in small. I have a 30-inch waist, and the small is loose on me. They are described as handmade, and to expect some variance, but there is a noticeable difference between individual items. Individually, they are well constructed, just inconsistent in size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026