SKU: 42373604799

Piston Set By JE - 84.5mm .50mm Oversize Bore | 9.5:1 CR | Stock Stroke 89.6mm - BMW N55/S55

Sale price$640.35 Regular price$711.50
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Description

Piston Set By JE - 84.5mm .50mm Oversize Bore | 9.5:1 CR | Stock Stroke 89.6mm - BMW N55/S55NOTE: 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. 327 Bore (mm) 84. 5 Top Compression Ring Thickness 0. 0400 Second Compression Ring Thickness 0. 0480 Oil Ring Thickness 0. 111 Forging Type FSR Volume (cc) 14. 70 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) 3.327
Bore (mm) 84.5
Top Compression Ring Thickness 0.0400
Second Compression Ring Thickness 0.0480
Oil Ring Thickness 0.111
Forging Type FSR
Volume (cc) -14.70
Series JE Pistons
Piston Head Type Inv Dome/Dish
Pin Diameter (IN) 0.866
Compression Height 1.275
Make BMW
Wrist Pin Style - floating or press fit Floating
Wall Type CHAMFERED
Wall Thickness (IN) 0.150
Ringset Part Number JG1001-3327-AL
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 338097S
Piston Pin Inside Diameter 0.566
Piston Pin Material 5115 LOW CARBON STEEL, CASE HARDENED
Piston Material 2618
Piston Pin Length (IN) 2.250
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 0.000
Brand JE Pistons


OE Part #'s:

11-25-8-619-196 / 11 25 8 619 196 / 11258619196

11-25-7-645-958 / 11 25 7 645 958 / 11257645958


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: 42373604799

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K D
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★★★★★ 4
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Style: KIT
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Reviewed in the United States on March 31, 2026
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Bridget Dempsey
Belleville, US
★★★★★ 5
Amazingly clean
Style: KIT
Love this product. It let my car spotless and it smells great too. I was surprised how easy it was to clean everything with it.
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Reviewed in the United States on May 19, 2026
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Wendy K
Battle Creek, US
★★★★★ 5
Great Kit with all the essentials
Style: KIT
The Chemical Guys Car Cleaning Kit is fantastic! It has everything you need to keep your car looking spotless and shiny. The products are high quality, easy to use, and leave a professional finish every time. I love how clean and fresh my car looks after using this kit—definitely worth the purchase for any car enthusiast!
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Reviewed in the United States on March 4, 2026
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fussy
Waukegan, US
★★★★★ 3
Not so good….
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On a brand new car used the citrus car wash product with the 2 bucket method and the interior and glass cleaner. The citrus product sank to the bottom of the 5 gallon bucket, despite all efforts couldn’t get it thoroughly mixed in the water. Used it anyway with the microfiber mitt - this mitt was excellent and I was satisfied with the wash (car was clean before washing except for bird droppings) except for eye irritation from a teeny splash. On to drying - the included microfiber drying towels were worse than worthless. They stuck to the surface of the car and shedded fibers all over the paint. I had to hose off the car to get rid of the purple lint it deposited wherever it touched the car. Larger chunks of lint came off the cloth as well. I used the interior and glass cleaner only on the interior of the windshield. Got in the car this AM, there was a haze on the entire windshield inner surface. Chemical Guys has excellent marketing and video tutorials but I’d recommend purchasing better quality components rather than what’s in this box. The ingredients in the wash, interior cleaner, and wheel cleaner are also not good for the environment, eyes, or skin. I wonder what the runoff from this one washing will do to our and neighbors’ vegetation.
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Reviewed in the United States on August 24, 2023
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Spencer sparks
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★★★★★ 5
Chemical guys car cleaning kit
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Bought for my brother and he was so happy! His favorite car cleaning brand 10/10
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