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Manley 04+ Subaru WRX/STi (EJ257) 83mm Stroke 99.75mm +.25mm Size B 8.5:1 CR Extreme Duty Piston Set

Marsoni M251S
Sale price$443.93
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Get it in 3 business days with 1 day shipping. Friday, May 29
Manley 04+ Subaru WRX/STi (EJ257) 83mm Stroke 99.75mm +.25mm Size B 8.5:1 CR Extreme Duty Piston SetOur signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability.
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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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4.0 ★★★★★
Based on 1154 reviews
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Verified Purchase
Roger
Alexandria, US
★★★★★ 5
Easy to install if you watch some online how to videos.
The water pump kit worked great on my 35 year old, 2 stroke, 100hp, Mercury Outboard.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2025
M
Verified Purchase
Mike M.
Bozeman, US
★★★★★ 4
Very good shipped and received fast
Missing one bottom gasket. Maybe factor made changes from old style
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2021
D
Verified Purchase
DW
Whiting, US
★★★★★ 5
Good impeller kit
Great kit for impeller alpha one gen two outdrive. The only thing that was missing is the instructions as a reference.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 14, 2025
A
Verified Purchase
Amazon Customer
Pawtucket, US
★★★★★ 5
Outboard impeller replacement kit.
This kit was for a 1999 Mercury Force 75 hp outboard motor. I purchased used and had not been run for a year. Impeller was hard and not flexible enough to pump water. The kit fixed that problem and the job took about 2 hours to complete. (I took my time). If you don't have a shop manual look for YouTube videos. I watched several and found one that matched the motor I was working on. Made things much simpler.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2022
A
Verified Purchase
Amazon Customer
Draper, US
★★★★★ 5
Excellent product
The water pump kit fits perfectly well on my 1997 Alpha 1 Gen+ Stern drive. Quality looks good and at reasonable price. I run the motorboat for 20 minutes and the water recirculation was constant
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2024

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