Ignitions and Electrical› Computers, Chips, Modules and Programmers

Unitronic

Stage 3 Upgrade Kit

$2,899.99

SKU: UH033-BTA

In Stock
In Stock
Ships by Aug 3
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

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.

MIA's Description

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.

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

BrandUnitronic
Part NumberUH033-BTA
CategoryIgnitions and Electrical

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.

View Full Return Policy