Turbo Upgrades

If you would like to have your turbo upgraded, please pack it well and send it to us with this form filled out. We can perform almost any upgrade service on your turbo. If you want something done that isn’t listed below, please email us for a quote for your specific turbo application. Prices will vary depending on the type of turbo you have, and the upgrade options that are specific to your turbo. We do not ship turbos, or perform these services, for customers outside of the US.  However, if you are an international customer and have a US shipping address that we can ship to, we can do that. In addition, any further service or any warranty claim would have to be handled through this US shipping address.

Available Turbo Upgrades:

  • 360° Thrust Bearings
  • Compressor Wheel Upgrades
  • Compressor Housing Upgrades
  • Turbine Wheel Upgrades
  • Turbine Housing Upgrades
  • Internal Wastegate Actuator Upgrades
  • Standard Turbo to Hybrid Turbo Conversion/Upgrade
  • Stock T25 Turbo to T28 or Big T28 Conversion/Upgrade
  • Upgrades for Stealths and 3000GT’s
  • Upgrade your 300zx twin turbos to Big T-28 turbos
  • Upgrade your Passatt/A4 K03 to K04 Specs
  • Upgrade your ’80-’81 Trans-Am turbo

Upgrade Overview

360° Thrust Bearing
We can replace your standard 270° thrust bearing with a steel “Monster” 360° thrust bearing. The price for a T3, T4, or T3/T4 360° thrust bearing is $95. For prices for other turbo models, please email us.

Thrust Bearing Comparison

Compressor Wheel Upgrades
Common compressor wheel upgrades are listed below. There are others available that are not listed, email with inquiries. ***All prices listed below INCLUDE the new parts, and the machining required for installation***

  • Garrett T3 Turbos: Upgrade from any T3 compressor wheel to most T4 compressor wheels. Example: Go from a T3 “60” Trim wheel to a T04B “S” Trim wheel. Prices start at $200
  • Garrett T4 Turbos: Example: Upgrade from T04E “50”” Trim wheel to a 60-1 wheel (many available). Prices start at $200
  • Garrett T25 Turbos: Example: Upgrade from a stock T25 wheel to a Big T28 wheel. Prices start at $200
  • Holset Turbos: Example: Upgrade from stock HX35 wheel to HX40 wheel. Prices start at $225
  • KKK K03 Turbos: Example: K03 wheel to K04 wheel. Prices start at $200
  • Mitsubishi TD04 Turbos: Stealths and 3000GT’s. Example: Upgrade from a 9b compressor wheel to a 13G, or from a 9B to a 15G. Prices start at $235
  • Mitsubishi TD05 Turbos: Example: 14B to a 16G, or 16G to 18G. Prices start at $225
  • Toyota CT26 Turbos: Supra/MR2/Celica Alltrac. Example: Upgrade from a stock wheel to any T04B S, V, or H trim wheel, or to any T04E 46, 50, 54, 57, 60, or 60-1 trim wheel. Prices start at $235

Compressor Housing Upgrades
Example: Go from a T3 housing to a T04B or T04E compressor housing. Prices start at $250

Turbine Wheel Upgrades
**All prices included the turbine shat/wheel and the machining required for installation**

  • Garrett T3: Example: Upgrade from a standard stage 1 turbine wheel to a stage 2, 3, or 5 turbine wheel. Prices start at $250
  • Garrett T25: (Most T25 applications) Example: Upgrade from a stock T25 turbine wheel to a stage 3 Big T28 turbine wheel. Prices start at $250
  • Mitsubishi TD04: Example: Upgrade from a TD04 turbine wheel to a TD04H turbine wheel. $250
  • Mitsubishi TD05: Example: Upgrade from a TD05 turbine wheel to a TD06. Email for pricing

Turbine Housing Upgrades
Raise or lower your turbine housing AR ratio to either bring your boost on sooner or later. Prices start at $150

Internal Wastegate Actuator Upgrades
Make your non-adjustable internal wastegate arm adjustable. This upgrade gives you more precise control over your boost, and allows you to dial the boost in as needed. $65

Standard Turbo to Hybrid Turbo Conversion

  • T3 turbo to T3/T4 hybrid Conversion. Prices start at $595 which includes all of the parts and machining required

Stock T25 to Big T28 Conversion

  • T25 to Big T28 Conversion. Prices start at $695 which includes compressor wheel, turbine shaft/wheel, and machining required

Stock K03 to K04 Conversion

  • K03 to K04 conversion. Prices start at $550 and includes an upgraded K04 compressor wheel, and K04 bearing system.
G-Pop Shop
We are a family business whose work is to provide it's customers with reliable high quality turbo rebuilds, upgrades and parts, along with customer service at a level that brings you back again and again.