Engines and Components› Pistons and Piston Rings

Wiseco

Wiseco Acura K20 K24 FLAT TOP 1.181X86.5MM Piston Shelf Stock Kit

$656.99

SKU: W00C K631M865

In Stock
In Stock
Ships by Jul 30
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Wiseco K631M865 is a top-tier, four-piece piston set crafted specifically for Honda K20A and K20Z (and select K24) engines. This Professional Series kit features an 86.50 mm bore and flat-top design, constructed from robust 2618 aluminum alloy for superior strength. Each piston is treated with ArmorGlide® to reduce friction and includes fully machined crown surfaces, finely-tuned ring grooves, and an anti-detonation groove. The kit comes complete with four pistons, premium ring sets, and wrist pins.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandWiseco
Part NumberW00C K631M865

Videos

ACURA RSX TYPE S K20 OIL PUMP INSTALL ON K24 BLOCK

ACURA RSX TYPE S K20 OIL PUMP INSTALL ON K24 BLOCK
Installing new forged pistons and rods in my K24Z3

Installing new forged pistons and rods in my K24Z3
How to Install Piston Rings

How to Install Piston Rings
How to Install Piston Rings | Engine Building 101

How to Install Piston Rings | Engine Building 101
Inside a 500+ HP Naturally Aspirated K24

Inside a 500+ HP Naturally Aspirated K24
A 1000 Horsepower K24 4 Cylinder Street Engine by 4 Piston

A 1000 Horsepower K24 4 Cylinder Street Engine by 4 Piston
Building a 500hp Naturally Aspirated K24 Engine with 4 Piston Racing

Building a 500hp Naturally Aspirated K24 Engine with 4 Piston Racing
Turbo K24 Accord: Wiseco Piston Install

Turbo K24 Accord: Wiseco Piston Install

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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