Sale

Engines and Components› Pistons and Piston Rings

Tomei

Forged Piston Set 86.50mm Bore for RB26DETT

$1,800.00 $1,620.00 Save $180.00

SKU: TA202A-NS05B

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The Tomei TA202A-NS05B is a forged piston designed for the Nissan RB26DETT engine. This piston features a bore size of 86.50mm, which is 0.50mm over the standard OEM size. It is compatible with a standard/2.8L crankshaft.

Constructed from A4032 aluminum alloy, these pistons are engineered for high-boost and high-RPM applications. They include a compression height of 30.00mm and are designed with valve recesses.
Show original supplier description
The Tomei TA202A-NS05B is a high-performance forged piston specifically engineered for the Nissan RB26DETT engine, with a bore size of 86.50mm (+0.50mm over OEM). This piston is designed to be used with a standard or 2.8L compatible stroke crankshaft. Crafted from A4032 aluminum alloy, the TA202A-NS05B piston is built to withstand the demands of high-boost and high-RPM engine builds. Key specifications include a 30.00mm compression height (OEM ±0.0mm), a 21.0mm pin diameter, and integrated valve recesses to accommodate valve lift. The piston volume is 10.8cc, contributing to a piston weight of 360.0g and a total kit weight of 466.0g. These pistons are part of Tomei's expanded forged piston series, offering a 0.5mm bore increase over stock. This option is ideal for builders who want to carefully utilize a precious cylinder block while maintaining its strength, offering a slightly smaller displacement than 1.0mm oversized options but preserving block integrity. For those seeking maximum power, Tomei also offers 1.0mm oversized pistons. The Tomei TA202A-NS05B piston set is compatible with Nissan 32 GT-R, 33 GT-R, and 34 GT-R models equipped with the RB26DETT engine.

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

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

BrandTomei
Part NumberTA202A-NS05B
CategoryEngines and Components

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy