Speed Pro 350 ci SB Chev - Flat Top Hypereutectic Pistons (SPH860CP 020)
SKU: 27241455786

Speed Pro 350 ci SB Chev - Flat Top Hypereutectic Pistons (SPH860CP 020)

Sale price$184.50 Regular price$205.00
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Speed Pro 350 ci SB Chev - Flat Top Hypereutectic Pistons (SPH860CP 020)SBC 383 CHEV FLAT TOP PISTON 381 c. i., 4. 020" bore, 3. 750 stroke, 5. 700" rod length, 5. 0cc dome volume Part Number: SPH860CP 020 Available on both hypereutectic and POWERFORGED pistons, DUROSHIELD is an exclusive moly graphite skirt coating that extends engine life and essentially eliminates scuffing. This technologically advanced coating is precisely applied to the piston through a computer controlled process. DUROSHIELD skirt coated pistons:

SBC 383 CHEV FLAT TOP PISTON

381 c.i., 4.020" bore, 3.750 stroke, 5.700" rod length, -5.0cc dome volume

Part Number: SPH860CP 020

Available on both hypereutectic and POWERFORGED pistons, DUROSHIELD is an exclusive moly-graphite skirt
coating that extends engine life and essentially eliminates scuffing. This technologically advanced coating is precisely applied to the piston through a computer-controlled process.

DUROSHIELD skirt coated pistons:

  • Reduce friction for increased fuel economy and horsepower
  • Essentially eliminate scuffing and wear
  • Prevent damage from inadequate lubrication, especially at start-up
  • Improve cylinder sealing for less blow-by and more power
  • Require no increase in skirt clearance

Piston Specifications :

  • CID: 381
  • Bore: 4.020
  • Stroke: 3.750
  • Rod Length: 5.700
  • Compression Height: 1.425
  • Compression Ratio with 64cc chamber volume: 10.35
  • Compression Ratio with 72cc chamber volume: 9.53
  • Compression Ratio with 76cc chamber volume: 9.18
  • Dome Volume: -12.0cc
  • Pin Type: Press or float
  • Recommended Ring Set: Moly - SPE251K 020, STD Fit - SPR9903 020, File Fit - SPR9343 025
  • Coated skirt
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 27241455786

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Thomas Boelter
Bozeman, US
★★★★★ 4
Socks
Size: Large, Color: (001) Black / Black / White
They are very comfortable and fit just right
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Reviewed in the United States on September 3, 2025
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Clint
Massapequa, US
★★★★★ 5
Great socks!
Size: Large, Color: (001) Black / Black / White
These fit true to size. Good socks.
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Reviewed in the United States on February 23, 2026
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PETER CROWE
Los Angeles, US
★★★★★ 5
Great for walking all day at work as well
Size: X-Large, Color: (001) Black / Black / White
I walk approximately 10 miles a day at work, in a manufacturing setting. On concrete with steel toe shoes. My feet have been begging me to change from the socks that I have worn for years. I have worn these other name brand socks for probably 10 years. So, change was obviously something I had to be pushed into. I got on Amazon and searched for training socks. I read the description. Glanced at the reviews. I decided to move forward with purchasing these. I could not have been happier. My feet began feeling better immediately. And the priced was very reasonible.
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Reviewed in the United States on April 12, 2026
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jcolis
Whiting, US
★★★★★ 5
You have one pair of feet. Treat them kindly with a pair of UA socks
Size: Large, Color: (100) White / White / Black
Soft and tough. Easy on the feet. Nice fit prevents sore spots and blisters.
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Reviewed in the United States on December 3, 2025
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LC
Alexandria, US
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
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Reviewed in the United States on February 18, 2026

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