If you’re serious about pushing your horsepower limits, the Garrett G55 turbocharger is a solid choice. This isn’t just another turbo; it’s built for the heavy hitters in the Radial vs The World and X275 Drag Racing scene. What sets the G55 apart? For starters, it’s got a new inconel turbine wheel that flows better than the previous models, and it’s housed in a one-piece aluminum center that’s lighter and more efficient.
Turbine Stage: The redesigned turbine wheel features G Series aerodynamics that bump up flow by about 15% compared to the GTX Gen II. We’re talking about a larger 106mm turbine exducer, which is 4mm bigger than the GTX55. You can choose from two stainless steel V-band turbine housings with A/R options of 1.24 and 1.40. If you prefer an open T6 setup, you’ve got four A/R sizes to pick from: 1.00, 1.12, 1.24, and 1.40.
Center Housing: The one-piece aluminum center housing isn’t just about looks; it cuts down on weight and has air cooling to keep things running smoothly. Plus, it’s got a 16mm dual ceramic ball bearing that really enhances rotor dynamics, and it keeps the same oil inlet and outlet specs you’re used to from the GTX line.
Compressor Stage: You’ve got options here too. The G55 comes in a range of compressor inducer sizes: 85mm, 88mm, 91mm, 94mm, 98mm, 102mm, and 106mm. Each size is designed to support a specific horsepower rating, so you can choose what fits your setup best.
Oil Fittings, Flanges, and Components:
Note: There are alternate oil fittings and flanges available if you need something specific.
For the nitty-gritty details, check out the Instruction Manual for the GRT-TBO-Q16 ATP Turbo Supercore Garrett G-Series, G55-1850 85mm, which is the G55 Turbo without the turbine housing. Trust me, if you want to take your setup to the next level, this is a solid option.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Advanced Tuning Products, Inc. (ATP Turbo) is a company that is solely dedicated to turbocharging. Its main goal is to engineer and manufacture quality turbocharging components that deliver a real difference in power gains. Currently located in Hayward, California, ATP Turbo offers an extensive lineup of innovative turbo components, all of which are backed by years of experience and a solid international reputation. The brand’s current lineup includes a wide range of blow-off valves, injectors, adapters, and several other turbo components that are engineered to bring about a significant boost in power.
Dedication to Quality and ReliabilityWhile that act of turbocharging itself is not “new”, many of the parts ATP Turbo creates are born from “fresh” ideas that arise from applying the basic principles of process improvement and re-engineering to turbo systems. Following these philosophies has helped ATP Turbo design and re-design turbocharging components that are reliable, better functioning, and, oftentimes, more simplified than their stock counterparts. ATP products can be purchased as separate components or as a complete kit. For those taking on a larger tuning project, an ATP Turbo kit is certainly the better choice as it has everything you need to get the job done efficiently.
ATP Turbo’s processes rely on the latest equipment and tools to build only the best products in a timely fashion. All of its products are built using the latest high-precision equipment like 4-axis Haas CNC milling stations and lathes. With this, the company is able to switch from prototypes to high-speed production in very little time. What’s more, they are manufactured from high-quality materials to ensure superior durability for longevity and reliability.
ATP’s turbocharging components complement the best turbochargers offered by the aftermarket industry. Garrett Engine Boosting Systems is known for its unsurpassed performance and reliability. Garrett turbo units provide the solid foundation for ATP’s turbocharging applications.
Upgrade to ATP Turbo at Vivid RacingIf you are looking for the finest turbo equipment on the market, then you’ve come to the right place. ATP Turbo manufacturer top-of-the-line turbochargers and turbo components to improve upon the already impressive performance figures of vehicles like the Ford Focus ST, Ford Fiesta ST, Subaru WRX, Mitsubishi EVO, and Hyundai Genesis. ATP produces and tests all of its own products to ensure that each part offers the consumer optimal performance gains.
If you are ready to release the potential of your ride, call our parts specialist today at (480) 966-3040. We will get you equipped with ATP Turbo and make the purchase process a simple and pleasant one.