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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
Piston Set by JE - 86.5mm Standard 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. 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) 25. 10 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) -25.10
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 297170S
Replaced By 288988
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 285
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
4.8 ★★★★★
Based on 2066 reviews
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Product Reviews
★★★★★ 5
Great pillow set! 😍
Size: King (Pack of 2), Style: Medium, Configuration: Hometextile
These were a great touch for our guestJust snagged these for the guest room. The material feels soft and high-quality, definitely a nice touch. They're really well-made and add a cozy vibe. Super happy with this purchase for sure. ✨ bedroom. They seem to love them. They are soft, material seems nice and well made. I would definitely order again.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
It’s ridiculous…
Size: King (Pack of 2), Style: Medium, Configuration: Hometextile
When I got these pillows I was a little disappointed that they appeared to be a little lumpy. I fluffed and let them rest for a couple of days to see if they’d poof up. Finally figured this was as good as they were going to get.
First night sleeping with them…my life has changed! I typically like a lot of pillows. I’m usually a restless sleeper. I fell asleep quickly and slept through the night for the first time since I can remember. No aches and pains as usual. It’s ridiculous that a couple of pillows could have made such a difference in my quality of sleep. Who knew?!
I’ll buy these for every bed in the house.
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Reviewed in the United States on August 12, 2024
★★★★★ 5
Great quality
Size: King (Pack of 2), Style: Medium, Configuration: Hometextile
LOVE this pillow. Soft and supportive for sitting against. Too big for sleeping but great for lounging.
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Do not buy, I recommend looking for something else
Size: King (Pack of 2), Style: Medium, Configuration: Hometextile
I don't like the quality of those pillows. They don't have any support, super flat, it's like just using the pillow sheet without the pillow. I honestly don't get why this could even be a product. Amazon Basics brand is veryh nice but this one was a very bad one. I usually go with anything but this was worst than cheap airbnb pillows.
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Reviewed in the United States on March 15, 2026
★★★★★ 5
Great
Size: King (Pack of 2), Style: Medium, Configuration: Hometextile
The medium density support is exactly as advertised and provides more support and firmness. The pillow is taller because of the density so maybe not great for stomach sleepers but works well for back and side sleeping. I bought this because I tried the same pillow at my sister’s house and woke up without neck pain for the first time in forever. Honestly better than my $100 pillow.
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Reviewed in the United States on May 17, 2026