Wiseco K1666 Top End Kit


Regular price$347.97   
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  • All Wiseco Pistons are forged from high silicon, low expansion aluminum which offers superior strength, reduced weight, improved heat transfer, and longer life.
  • Diamond turned finish from one of the many CNC computer controlled turning centers guarantees you a perfect finish with no size variation. Wiseco pistons can be installed in any of today’s cylinder bore compositions (cast iron, chrome, nikasil and boron composite) with confidence.
  • Wiseco’s wide range of oversize pistons increase the life of cast iron lined cylinders. With the availability of replacement cylinder sleeves, chrome, nikasil and boron composite cylinders can be resleeved to accept Wiseco’s oversizes.
  • Wiseco’s state-of-the-art computerized manufacturing facility is dedicated to supplying both the high-performance racer and recreational enthusiast with the finest forged piston available in today’s market place.
  • Three WPS warehouses offer you one of the largest Wiseco inventories available. Our telephone sales staff can verify availability at the time of your order. Pistons that we don’t have in stock are rushed in air freight and are available for shipment to you within two to three working days.


  • Diamond turned finish from one of the many CNC computer controlled turning centers guarantees you a perfect finish with no size variation. Wiseco pistons can be installed in any of today?s cylinder bore compositions (cast iron, chrome, nikasil and boron composite) with confidence.

  • Wiseco's wide range of oversize pistons increase the life of cast iron lined cylinders. With the availability of replacement cylinder sleeves, chrome, nikasil and boron composite cylinders can be resleeved to accept Wiseco?s oversizes.

  • Wiseco's state-of-the-art computerized manufacturing facility is dedicated to supplying both the high-performance racer and recreational enthusiast with the finest forged piston available in today?s market place.

  • Three WPS warehouses offer you one of the largest Wiseco inventories available. Our telephone sales staff can verify availability at the time of your order. Pistons that we don?t have in stock are rushed in air freight and are available for shipment to you within two to three working days.
  • What shipping options are available?

    Online orders will be shipped through FedEx, USPS, OnTrac, or other reputable shipping services based on what we determine to be the best option. We (do not) ship to P.O. boxes. Please contact us if you are interested in an expedited shipping on your order.

    Do you ship outside of the USA?

    No, unfortunately at this time we only ship to the lower 48 states in the USA.Do you ship to Alaska and Hawaii?

    We (do not) ship to Alaska and Hawaii.

    What could cause a shipping delay?

    Shipping delay can occur when the wrong address or zip code is submitted for the shipping address. If the shipping company can not deliver the package we will contact you via phone or email.

    During the holiday season shipping delivery may vary.

    How do I return an item?

    Please fill our our RMA form. If you have an account, go to the order to fill out the form. If you don't it is under policies. Items can be returned within 45 days after purchase. Items must be in new/unused condition with all of the original packaging. Customers who make a mistake with their order are responsible for return shipping costs. Discounted return labels can be purchased. If we have made a mistake, please email with pictures of what you received including the part number and the year, make and model of your machine if applicableIs there a cost on returns?

    If an item needs to be returned the shipping fees are the customer's responsibility.

    Amount of refund will be based on the purchase price of your product.

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