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Engines and Components› Pistons and Piston Rings

Nissan

RB25DET Stock Bore Piston Ring Set

$151.97 $138.00 Save $13.97

SKU: 12033-21U10

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Nissan 12033-21U10 is a genuine OEM piston ring set. These piston rings are designed for RB25DET engines with a stock piston bore size. They are required when replacing engine pistons.
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The Nissan 12033-21U10 is a genuine OEM piston ring set designed to meet the specific requirements of RB25DET engines. These standard-size rings have a bore size of 86 mm and are essential for engine rebuilds or overhauls when reusing stock pistons. The piston ring set functions as a crucial seal between the piston and the cylinder wall. This sealing action ensures optimal compression within the engine cylinder and minimizes oil leakage into the combustion chamber, contributing to overall engine health and performance. These piston rings are specifically engineered for Nissan RB25DET engines, including models such as the Skyline R33 GTST and Stagea WC34 (non-Neo).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandNissan
Part Number12033-21U10
CategoryEngines and Components

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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