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Description
Piston Set by JE - 86.5mm Standard Bore | 11.5:1 CR | Stock Stroke - 89.6mm - S52 BMWNOTE: Image shown not actual parts. JE Pistons is the leader in forged racing pistons. With 70 plus years of experience, in house forging, and industry leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports. Bore (in) 3. 406 Bore (mm) 86. 5 Top Compression Ring Thickness 0. 0400 Second Compression Ring Thickness 0. 0480 Oil Ring Thickness 0. 111 Forging Type FSR Volume (cc) 9. 40 Series JE Pistons Piston
NOTE: Image shown not actual parts.JE Pistons is the leader in forged racing pistons. With 70-plus years of experience, in-house forging, and industry-leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports.
Bore (in) 3.406
Bore (mm) 86.5
Top Compression Ring Thickness 0.0400
Second Compression Ring Thickness 0.0480
Oil Ring Thickness 0.111
Forging Type FSR
Volume (cc) -9.40
Series JE Pistons
Piston Head Type Inv Dome/Dish
Pin Diameter (IN) 0.866
Compression Height 1.220
Make BMW
Wrist Pin Style - floating or press fit Floating
Wall Type CHAMFERED
Wall Thickness (IN) 0.150
Ringset Part Number JG1001-3405
Ring Brand ProSeal
Ringset Included Yes
Retainer Thickness 0.063
Retainer Lock Style Wire Lock
Retainer Lock Part Number 866-063-MW
Retainer Diameter (IN) 0.866
Replacement Single Piston 297172S
Replaced By 288990
Piston Pin Inside Diameter 0.566
Piston Pin Material 5115 LOW CARBON STEEL, CASE HARDENED
Piston Material 2618
Piston Pin Length (IN) 2.250
Piston Avg Wt 291
Pin Offset Yes
Pin Brand JE Pistons
Pin Part Number 866-2250-15-51C
Pin Included Yes
Pin Diameter (mm) 22.00
Oil Rail Support Included No
Deck Clearance 0.030
Brand JE Pistons
OE Part #: 11-25-1-405-702 / 11 25 1 405 702 / 11251405702
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
4.7 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
It works!
Color: White, Size: Standard (20" X 26")
Wow, very chilly.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Amazing Cooling Pillowcases – So Comfortable!
Color: Gray, Size: Standard (20" X 26")
I absolutely love these LUXEAR pillowcase They feel cool and soft and they really help keep my pillow fresh and comfortable throughout the night. The fabric feels high quality and doesn’t trap heat The size is perfect, and getting two in one pack is a great value for the price I highly recommend them if you’re looking for a more comfortable sleep
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Reviewed in the United States on March 1, 2026
★★★★★ 3
Not worth it
Color: Gray, Size: King (20" X 36")
These start out nice and cool but within minutes your body heat turns them warm. Not worth the money.
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Reviewed in the United States on November 23, 2025
★★★★★ 5
Great cooling effect!
Color: Stretch Blue, Size: Queen (20" X 30")
I love these pillow cases! They are the best cooling pillowcases I have found. They do still eventually absorb the body heat and need to be flipped over but so far, the cooling effect of these cases outlasts the rest. I have had them for 5 years now and will not use any other cases. They are smooth like silk so I think they are good for my hair as well. The color is pretty close to what is shown in the picture and they fit most standard pillows.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Excellent pillow case
Color: Gray, Size: Standard (20" X 26"), Color: Gray, Size: Standard (20" X 26")
I bought this Luxear from pillowcase a few days ago and I’m very happy with it.
The standard size fits my pillows perfectly, and the gray color looks modern and goes well with my bedding .
I love it because It has two sides: one with cooling fabric that really feels fresh to the touch (perfect for hot nights), and the other side made of soft cotton, which feels cozy and comfortable.
After just a few days of use, I already notice the difference.
I sleep much more comfortably and no longer wake up feeling too warm.
The material feels high quality and durable. It doesn't have any strange smell which I love from the first moment
Definitely a great purchase!
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Reviewed in the United States on October 6, 2025