SKU: 44643987325

Piston Set by JE - 86.5mm Standard Size Bore | 12.5:1 CR | Stock Stroke - 89.6mm - S52 BMW

Sale price$520.20 Regular price$578.00
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13

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Description

Piston Set by JE - 86.5mm Standard Size 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. 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) 5. 00 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) -5.00
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 297174S
Replaced By 288992
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 292
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
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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.
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SKU: 44643987325

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4.1 ★★★★★
Based on 11 reviews
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A
Verified Purchase
Amy
San Leandro, US
★★★★★ 5
Actually does what it says!!!
Color: Mayday
Terns is AMAZING!! I wish I would have found it the day after my burn. I feel asleep on my hammock for 3 hrs and my face turn into a tomato 🍅. Next 3 days just tightness and sore. Then comes the peeling and it was like face dandruff. I search online did my research then found on Amazon and checked out the reviews and pulled the trigger. I have never been happier with a product and it actually does what it says it will and the reviews say. I washed my face first then put it on and it was like ahhhhh. The first 2 days I had to put it on twice a day but my face never once looked like I had put Elmers glue on just to peel off. Then everyday after, just 1 application needed but 2 if you want because my skin was glowing!! I think I might just make this my new face moisturizer. Do yourselves a favor and stop looking just go with this one!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
A
Verified Purchase
Ashley Thornbrugh
Fort Morgan, US
★★★★★ 5
Actually works!
Color: Mayday
The bottle is small but it does a big job with a small pea-sized amount! Takes the burn out and reduces redness and peeling quickly! Love this product!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
S
Verified Purchase
Summer
Omaha, US
★★★★★ 1
Save your money
Color: Mayday
We bought this specifically for our trip to Florida and had high hopes based on all the positive reviews. Unfortunately, it was a complete disappointment. I used it on all five members of our family exactly as directed, and it did absolutely nothing for any of us. Not only was it ineffective, but it was also extremely overpriced for the results we got—which were none. We felt like we wasted our money on a product that simply doesn’t work as advertised. Looking back, I wish I hadn’t trusted the reviews and had saved my money instead. I rarely leave negative reviews, but I feel it’s important to share my experience so others can make a more informed decision. Based on our experience, I would not recommend this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
C
Verified Purchase
Cassandra
San Leandro, US
★★★★★ 5
Works
Color: Mayday
A little does go a long way. It’s on the pricy side but it was worth it. It’s not something to be using all the time. But definitely a back up for whenever you do get sunburn
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
D
Verified Purchase
Dreazyed
Boise, US
★★★★★ 5
Really effective!
Color: Mayday
I was totally blown away by how effective this was on my recent burn, I wish I had taken pictures. So much so that I did a deep dive into the ingredients and formula (I'm a nerd). My takeaway is that this is a bargain for the quality of ingredients and the care of the formula. The product absorbs quickly, is non-greasy, and relatively moisturizing and most of all, really effective. I personally appreciate the lack of any real scent or fragrance. I'm a big fan!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026

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