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Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore (Part Number: )
Wiseco Piston Set 100mm Bore
Subaru EJ25 Turbo Models (inc. 2006-2014 WRX / 2004+ STI)
Read 2 Reviews | 2 Q&As
Part # K598M100AP
$583.31
msrp: $641.00

In stock! Ships same day

Features & Product Details

RallySport Direct proudly carries essential engine internals brought to you by Wiseco.

On this page, you are looking at the Wiseco High-Performance Forged Piston Set. This is a great option for those of you who are performing an engine rebuild and need a set of pistons that are designed to sustain the perils of high horsepower and high boost.

Here are the details:

  • 100mm Bore
  • 8.9:1 Compression ratio
  • Dedicated 2618 alloy forgings
  • Includes Nitrided/Napier steel rings
  • Includes offset wrist pins
  • Skirt coatings
  • Complex dish and dome designs
  • Special skirt profiles
  • Specifications

    Brand: Wiseco
    Anti-Friction Coating: Yes
    Bore Size: 100mm
    Compression Ratio: 8.9:1
    Head Alteration Required: No
    Machining Required: Yes
    Material: Forged
    Piston Rings Included: Yes
    QTY: 4
    Wrist Pin Clips: Yes
    Wrist Pins Included: Yes
    Mfgr. Warranty: No Warranty
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days


    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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    REVIEWS & CUSTOMER MEDIA

    2 Reviews
    5 out of 5 Stars
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    1 of 1 people found the following review helpful
    Great parts, great service 3 years ago
    NorthernInterceptor
    Kudos to the CSR whose name sadly evades me right now... he spent a good chunk of time on the phone with me as we decided which piston offering was correct (ultimately, these ones) for my 2006 LGT. I suffered the dreaded ring land failure due to the original owner not getting the revised stock tune from Subaru. I'm 1100kms in on my break-in with zero issues on these 20-over pistons.My tech was happy that I went with Wisecos as well. Everything went back together perfectly.
      
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    1 of 1 people found the following review helpful
    Quality 5 years ago
    jor0768733
    Excellent packaging. Quality parts. Nice smooth coating. Perfect for those looking to bored out the cylinder walls to start fresh. I called Weiseco and the remmomended a .003 wall clearance, my builder seemd to have liked that number as well as the pistons and block are made of a different material and the pistons will expand at a different rate. No piston slap at this clearance Very pleased with the product and the service at RSD. Thanks!
      
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    QUESTIONS & ANSWERS

    • Q: Clearance question  Chris884 years ago

      What would the clearance's be when using these with Darton Iron Dry Sleeves Subaru EJ25 Motors?
      • 0 of 0 people found the following answer helpful

        A:  With the Darton Sleeves out of the box, they will not work with these pistons but the sleeves can be bored out up to 102mm, well encompassing these 100mm bore pistons.

        Sterling W. @ RallySport Direct 4 years ago  
          
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    • Q: valves  josh_hypermiler374195 years ago

      Are these compatible with plus size valves and cams?
      • 0 of 0 people found the following answer helpful

        A:  That is going to heavily depend on your headgasket thickness, AVCS settings, along with rod length. For proper fit that is something you would need to check by claying the motor or having a machine shop check for you due to the millions of variables that play into effect of what other components you are using in your motor.

        Kirill C. @ RallySport Direct 5 years ago  
          
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