---
product_id: 77314729
title: "ProX Racing Parts 01.4121.B Piston Kit"
brand: "prox racing parts"
price: "VT38769"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/77314729-prox-racing-parts-01-4121-b-piston-kit
store_origin: VU
region: Vanuatu
---

# Oversize options up to +2mm CNC precision machining Complete install kit included ProX Racing Parts 01.4121.B Piston Kit

**Brand:** prox racing parts
**Price:** VT38769
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your engine game with ProX precision power!

## Quick Answers

- **What is this?** ProX Racing Parts 01.4121.B Piston Kit by prox racing parts
- **How much does it cost?** VT38769 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/77314729-prox-racing-parts-01-4121-b-piston-kit)

## Best For

- prox racing parts enthusiasts

## Why This Product

- Trusted prox racing parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Broad Compatibility:** Ideal for motorcycles, scooters, ATVs, mopeds, and personal watercraft—upgrade your ride effortlessly.
- • **Precision CNC Machined:** State-of-the-art manufacturing ensures exact fit and superior durability.
- • **Versatile Oversize Options:** Multiple oversize increments (A, B, C, D+) extend cylinder life and boost rebuild flexibility.
- • **All-in-One Ready to Install Kit:** Includes pistons, rings, wrist pin, and circlips—no extra parts needed.
- • **Engineered for Peak Performance:** Crafted from low-expansion, low-friction alloy trusted by top Japanese manufacturers.

## Overview

ProX Racing Parts 01.4121.B Piston Kit delivers precision CNC-machined pistons made from advanced low-expansion, low-friction alloy used by leading Japanese engine makers. Available in standard and multiple oversize options up to +2mm, this complete kit includes all necessary components for a seamless installation, enhancing engine longevity and performance across motorcycles, scooters, ATVs, and watercraft.

## Description

ProX racing pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. ProX Piston Kits are a first class solution to replace the original piston in your motorcycle, scooter, moped, ATV, personal watercraft and more. ProX Piston Kits for sleeved cylinders are available in standard size and a wide range of oversize's. The availability of oversize's up to 2 millimeters significantly helps to increase the lifespan of a cylinder by offering more re-boring possibilities. ProX racing pistons for plated cylinders come in standard size, as well as in A, B, C, D+ oversize's. All ProX Piston Kits are supplied complete with pistons, piston rings, wrist pin and circlips, ready to install.

## Features

- Pistons for plated cylinders come in standard size, as well as in A, B, C, D+ oversize's
- Pistons for sleeved cylinders are available in standard size and a wide range of oversize's
- Uses the same low-expansion, low-friction piston alloy as used for all major Japanese engine manufacturers
- Precision machined on the latest, state of the art CNC equipment
- All ProX piston kits are supplied complete with pistons, piston rings, wrist pin and circlips, ready to install

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ProX Racing Parts |
| Brand | Prox Racing Parts |
| Model | 01.4121.B |
| Item Weight | 3.2 ounces |
| Product Dimensions | 1 x 1 x 1 inches |
| Item model number | 01.4121.B |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 01.4121.B |
| OEM Part Number | 01.4121.B |

## Images

![ProX Racing Parts 01.4121.B Piston Kit - Image 1](https://m.media-amazon.com/images/I/61TYadyExNL.jpg)

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**Shop now:** [https://www.desertcart.vu/products/77314729-prox-racing-parts-01-4121-b-piston-kit](https://www.desertcart.vu/products/77314729-prox-racing-parts-01-4121-b-piston-kit)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-05*