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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
Piston Set by JE - 86.5mm +.50mm Oversize Bore | 9.0:1 CR | Stock Stroke - 85.8mm - S50 BMW M3NOTE: 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) 24. 20 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) -24.20
Series JE Pistons
Piston Head Type Inv Dome/Dish
Pin Diameter (IN) 0.866
Compression Height 1.291
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 297180S
Replaced By 288917
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 301
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 #: 11-25-1-404-961 / 11 25 1 404 961 / 11251404961
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 1266 reviews
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Product Reviews
★★★★★ 4
Cool
Color: Grey, Size: Queen (88" X 88")
Loooove this blanket so soft nice and cool to lay with. Perfect summer blanket or even winter if you prefer sleeping cooler !
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Magic!
Color: Grey, Size: King (102" X 90")
This comforter is super soft. Almost silky feeling. Very easy to wash and dry. It does as advertised. It keeps me super cool. I love it so much that I bought a second one for my camp. It is so cool to the touch. The fit is true to size. It's not thick but not too thin either.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Best Sleep
Color: Light Blue, Size: King (102" X 90")
This comforter is perfect for summer sleeping! The material is soft and has a cooling feel to it all night long. It is just the right thickness for enough warmth. The blue color is lovely and looks great ! Highly recommended this comforter.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Bought this for my son and just ordered me one
Color: Grey, Size: Queen (88" X 88")
My son's college apartment runs warm (that is probably because college students trying to save money) so we decided to order him this cooling comforter. I have been wanting one since entering menopause but never bought one for myself (the things we will do for our kids but not ourselves) so when his came in I told him I was going to use it to see if I liked it and if it helped with the night sweats until we met up to give it to him...those three nights of me using it were enough for me to want one. This is a game changer! It is thin like a blanket so we removed the flat sheet and put this under our regular comforter. My husband needs the thickness of our regular comforter because he says I freeze him out at night. This 'comforter' is so soft, fits the bed great (as a blanket or comforter), and is truly cooling. Now, that's not to say I haven't woken up a little on the warm side but all I need to do is readjust to a cool spot under the blanket and I fall right back to sleep. The grey is very light but it is washable as needed.
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Reviewed in the United States on March 28, 2026
★★★★★ 5
Perfffff
Color: White, Size: Oversized King, Color: White, Size: Oversized King
So very comfy! I did not expect to love this as much as I do. I was worried about it being too hot. It’s not. I was used to sleeping with a quilt but this is so comforting, the weight of it is so cozy & perfect. I sized up with oversized king for my king size duvet cover. Its so fluffy and perfect for the aesthetic I wanted
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Reviewed in the United States on June 8, 2026