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Wiseco 6542M81AP Honda B16A Turbo Flat Top Forged Piston 81.00mm Bore 1.175in Compression Height -2.4cc

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

6542M81AP
10 reviews
Sale Price

$240.99

Estimated ship date Thursday, November 19

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Product Details

The Wiseco 6542M81AP is a Professional Series forged piston engineered specifically for turbocharged Honda B16A engines. Featuring a flat top, -2.4cc dish design with an 81.00mm (3.189 in.) bore and a compression height of 1.175 in. (29.85mm), this piston is purpose-built for boosted applications where lower compression ratios are required to handle elevated cylinder pressures safely.

Key Specifications:

  • Bore: 81.00mm (3.189 in.)
  • Compression Height: 1.175 in. (29.85mm)
  • Crown Volume: -2.4cc (flat top)
  • Stroke: 3.047 in. (77.4mm)
  • Rod Length: 5.287 in. (134.3mm)
  • Wrist Pin Diameter: 21mm (0.8268 in.)
  • Sold: Individually (single piston)

Key Features:

  • 2618 Aluminum Alloy: Forged and machined in the USA for superior tensile strength and heat resistance compared to factory cast or hypereutectic pistons
  • ArmorGlide® Skirt Coating: Reduces friction and wear, provides seizure resistance, and quieter operation
  • Fully Machined Crown: Precision crown geometry promotes efficient combustion charge flow and optimized quench during the compression/combustion cycle
  • Anti-Detonation Groove: Disrupts the flame front to reduce detonation risk under boost
  • Precision Ring Grooves: Machined to exact tolerances for maximum ring seal and minimized blow-by and oil consumption
  • Forced Pin Oiling: Dedicated oiling passage lubricates the wrist pin under high load conditions, reducing wear on the pin and connecting rod small end
  • AP Coating: Thermal barrier coating on the piston crown for added heat management in high-boost applications

The 6542M81AP is a shelf-stock piston, making it a convenient choice for builders working with standard B16A bore dimensions. It is sold as a single piston — order four for a complete engine build. This piston is rated for heavy to severe duty performance applications and is the preferred choice for Honda B16A turbo builds where reliability under sustained high cylinder pressures is essential.

Ordering was very easy, and the part shipped right away. Will use autoplicity again without a doubt.

TOOK ME 5 MINUTES TO FIND WHAT I NEEDED, AND SHIPPING IS REASONABLE. NOW I WAIT

Easy and quick check out

Easy shopping experience

Very fast process, just hoping it's the right item. The description was not very good.

unable to find MEGUIARS#40vinyl/rubber cleaner 16oz. locally autoplicity had it on line in stock at a great price. fast shipping,great comm.with buyer.will buy from them again thank you.

Received my product today was happy with the item purchased and will buy again from Autoplicity. Was received in a timely manner and like described

Great site has alot of items in stock. Shipped promptly! Can't wait to do buisiness again.

Thanks for the fast processing and great prices!

first and last place i had too look had my part it was great

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