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Description
Piston Set by JE - 87mm +.50mm Oversize Bore | 9.0:1 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. 425 Bore (mm) 87. Top Compression Ring Thickness 0. 0400 Second Compression Ring Thickness 0. 0480 Oil Ring Thickness 0. 111 Forging Type FSR Volume (cc) 25. 80 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) 3.425
Bore (mm) 87.
Top Compression Ring Thickness 0.0400
Second Compression Ring Thickness 0.0480
Oil Ring Thickness 0.111
Forging Type FSR
Volume (cc) -25.80
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 JG1001-3425
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 297171S
Replaced By 288989
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 290
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
4.9 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Luxury Comfort and Perfect Support – Best Pillows Ever!
Color: White, Size: King Size Set of 2
I recently purchased the Serta Hotel collection Pillows White Goose Feather Down Fiber Gusseted, and I couldn’t be happier with my choice! These pillows are the perfect balance of softness and support — plush enough to feel luxurious, yet firm enough to keep my neck properly aligned all night. The gusseted edges really make a difference, helping the pillow hold its shape and look full even after weeks of use.
The quality of the materials is excellent — the outer cover feels smooth and breathable, and there’s no feather poking out like with cheaper options. I also appreciate that they fluff back up easily after use, making the bed look hotel-perfect every morning.
If you’re looking for comfortable, high-quality pillows that provide great value for the price, I highly recommend these. They’ve truly improved my sleep!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 7, 2025
★★★★★ 4
Good quality pillows
Color: White, Size: Queen Size Set of 2
These are very soft and supportive as advertised. W find them a little too thick for my taste (why I only gave 4 stars), but personal preference is very subjective with pillows. They are well made and high quality, and am happy with my purchase.
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Reviewed in the United States on January 15, 2026
★★★★★ 3
Overall, not that comfortable!
Color: White, Size: Queen Size Set of 2
Only okay. I find these pillows to be heavy, and not very conforming. Overall, not that great.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
goose down pillows.
Color: White, Size: King Size Set of 2
Since receiving them, these king-size white goose down pillows have truly transformed my sleep. They are incredibly soft and fluffy to the touch, so plush it's hard to believe they hold their shape. Sleeping on them is like lying on a cloud.
The 100% cotton cover adds extra comfort: it feels cool to the touch, breathes well throughout the night, and helps me maintain a comfortable temperature while I sleep. Furthermore, the "reinforced fiber" structure is noticeable: after several weeks of use, the pillows retain their support; they don't clump or lose their shape, ensuring consistently good rest.
I find they have the ideal balance between firmness and softness: firm enough to support my neck and head, yet plush enough to adapt to my posture without creating pressure. This has improved my nights; I sleep more soundly and wake up with less stiffness in my neck.
In short: these pillows combine luxury, comfort, and durability. If you're looking to improve your sleep quality with soft, firm, and breathable pillows—especially in king size—these are perfect. Definitely one of the best investments you can make for better sleep.
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Reviewed in the United States on November 30, 2025
★★★★★ 5
Classy
Color: White Seersucker, Size: King(108"x90")
Simple yet classy. Lightweight. Quick and easy to make bed! Love it!
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Reviewed in the United States on May 23, 2026
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