Ignitions and Electrical› Computers, Chips, Modules and Programmers

Unitronic

Stage 3 Upgrade Kit

$2,899.99

SKU: UH033-BTA

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Overview

The Unitronic Stage 3 Upgrade Kit is a hardware and software bundle designed for the MK8 GTI. It includes the direct drop-in Garrett PowerMax Turbocharger and Unitronic Stage 3 ECU Software. This package can produce upwards of 470HP / 425 LB-FT on 93 octane fuel, with potential for more on E85 and supporting fueling upgrades.
Show original supplier description
The Unitronic Stage 3 Upgrade Kit is a comprehensive package for the MK8 GTI, integrating the Garrett PowerMax Turbocharger with Unitronic's Stage 3 ECU Software. This direct bolt-on turbocharger features GTX Gen II compressor aerodynamics, increasing flow by 32% over the OEM unit. The turbine wheel is constructed from high-temperature Mar-M alloy, paired with advanced turbine aerodynamics and a twin-scroll stainless steel housing capable of withstanding up to 1050°C. This setup is built on a latest-generation journal bearing rotating group with a 360° reinforced thrust bearing for enhanced durability.

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

BrandUnitronic
Part NumberUH033-BTA
CategoryIgnitions and Electrical
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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.

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.

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