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- USA
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Piston Set by JE - 87mm +.50mm Oversize Bore | 12.5:1 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. 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) 5. 50 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) -5.50
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 297175S
Replaced By 288993
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 297
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.
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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 2230 reviews
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Product Reviews
★★★★★ 5
Excellent Kindergarten prep
Format: Paperback
My daughter is loving all of the learning exercises and has started feeling more confident heading in to Kindergarten.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 5
Excellent Summer Workbooks - Keeps Kids Engaged and Ready
Format: Paperback
These workbooks have been an absolute lifesaver for keeping my kids on track over the summer! I was looking for a resource that would help them retain what they learned and prepare for the next school year without feeling like a chore, and these deliver perfectly.
What I particularly love is how well **organized they are by days**. This structure eliminates any guesswork and makes it incredibly easy to assign manageable chunks of work each day, which helps to **keep my kids consistently on track**. There's no overwhelm, just steady progress.
The content is engaging, and it genuinely seems to reinforce key concepts in a fun way. We've had **absolutely no complaints** from the kids, which is a huge win for any summer learning material! I highly recommend these workbooks for any parent looking for a structured and effective way to bridge the academic gap during the summer break.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2025
★★★★★ 5
Fun for my Kindergarteners!
Format: Paperback
This activity book is a fantastic, age-appropriate resource that makes summer learning both fun and effective for Kindergarteners transitioning to 1st grade! The pages are thoughtfully designed with easy-to-follow activities that keep young minds engaged while reinforcing essential skills. The addition of flashcards, stickers, and eBooks takes the learning experience to the next level, making practice feel like playtime.
One of my favorite features is the encouragement of hands-on learning and movement through exciting fitness challenges—because learning shouldn't just be about worksheets! It turns what could be a boring review into an adventure filled with creativity and energy. This workbook truly helps bridge the summer gap while keeping kids motivated and excited for the next school year. A must-have for any little learner’s summer routine!
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Reviewed in the United States on March 19, 2025
★★★★★ 5
Recommend
Format: Paperback
Has been a great learning book
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
★★★★★ 4
Teacher approved
Format: Paperback
Great review book to help bridge the learning between Kindergarten and 1st grade. Teacher approved!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2025
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