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Wiseco Pistons Honda Acura RSX-S K20 K24 K20Z 87mm 11.0:1-12.8:1 K634M87

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Product Description

Upgrade your Honda or Acura K20/K24 engine with these premium Wiseco Pistons designed for high performance and reliability. Trusted worldwide by Formula 1, Indy Racing League, and NHRA Pro Stock teams, Wiseco delivers race-winning piston technology right to your build.

Key Features:

  • Precision forged from dedicated in-house forgings for lightweight strength

  • Advanced multivalve piston design with valve pockets, complex dome & crown shapes

  • Includes stainless steel gas nitride rings and optimized skirt profiles for max efficiency

  • Proprietary ArmorGlide skirt coating reduces friction, freeing extra horsepower

  • Sold as a complete set of 4 pistons with rings, pins, and clips included

Specifications:

  • Compatible Engines: Honda/Acura K20 & K24 series (K20Z, RSX-S, etc.)

  • Bore Size: 87mm (Standard)

  • Compression Ratio: 11.0:1 (K20) to 12.8:1 (K24)

  • Dome Face Type with 5cc dome volume

  • Gasket Thickness: 0.025"

  • Head CC: 50.5

  • Weight: 303 grams per piston

  • Pin Size: 22mm (Standard Pin Included)

  • Compression Height: 30mm

  • Rod Length: 5.472" / 5.894"

  • Stroke: 3.386" / 3.897"

Included with your purchase:

  • 4 Wiseco forged pistons

  • Matching rings (Part# 8700XX)

  • Pins and pin locks (Standard Pin S618, Pin Locks W5590)

Why Choose Wiseco?
Wiseco pistons are engineered for motorsport-level durability and performance. Their advanced coatings and design reduce friction and optimize combustion, delivering more power and longer engine life. Perfect for turbo, naturally aspirated, or high-compression builds.

Condition:
Brand new, factory sealed, and ready for immediate shipment.

Shipping & Payment:
We ship quickly and securely with tracking. Pay safely via PayPal or major credit cards.

Boost your build’s performance and reliability with genuine Wiseco Pistons—trusted by champions!

  • All orders placed on eBay are shipped with standard shipping within the Continental U.S.
  • Standard Shipping is either USPS Ground Advantage, UPS Ground or FedEx Ground.
  • Shipping times may very depending on shipping service used.
  • Upgraded shipping is available upon request, but additional costs will apply.
  • Orders must be placed by 12pm EST Monday - Friday to start processing on the same day. Processing time takes 1 business day.
  • Delivery times are based on orders placed between Monday - Friday.
  • Orders placed on Saturday or Sunday will not be processed until the following Monday.
  • Hawaii, Alaska and Puerto Rico do not qualify for Free Shipping.
  • For shipments to Hawaii, Alaska, or Puerto Rico we offer USPS Priority, USPS Express, FedEx, and UPS 2 Day and 1 Day shipping services. Please inquire with us for shipping rates before placing your order.
  • We accept PayPal payments.
  • Immediate payment is required.
  • For unopened and unused merchandise we offer a 30 Day Money Back Return Policy (minus a standard 20% restocking fee).
  • Return shipping is always the buyer's responsibility.
  • Buyer must contact HPTautosport before returning any merchandise. We reserve the right to refuse any returns received without authorization.
  • Fr items that have been opened or installed: only the manufacturer's warranty applies, no refund or return is allowed.
  • For items purchased in error or after 30 days, HPTautosport wil determine if the return will be allowed.

HPTautosport strives to be your #1 source for aftermarket performance parts and service.

With over 20+ years of experience in the automotive industry and a lifelong passion for motor sports, we have the knowledge and expertise to assist you with every aspect of your vehicle.

Unlike our competitors, we not only sell parts but we install these parts daily in our full service performance facility in Arden, North Carolina.

Our mission here at HPTautosport is to gain your business by offering top quality products and great service at affordable prices. All website orders generally ship within 1 business day. If there is a problem with your order, we contact you right away.

We want you to be happy with our products and services, so we always go the extra mile to make sure you keep coming back for years to come. Check out our store today!

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