Apexi Turbo Charger Systems feature ball bearing turbos built to our specifications by IHI. We specifically selected IHI turbos because of their reliability and efficient ball bearing design. Hundreds of research and development hours were spent on the ma
The HKS GT Series Turbos are based on ball-bearing Garrett units and like the HKS Signature Series have re-engineered compressor and turbine wheels along with specific A/R and trim levels. All GT Series Turbos are designed to be a perfect blend of power and response. HKS achieved this balance by first choosing to use a ball-bearing center cartridge to reduce friction along with an off-center turbo design for improved efficiency and flow. Next HKS carefully tested Trim and A/R levels along with different inlet and outlet diameters to achieve optimal power. The results of this combination are turbos that not only deliver amazing power, but also spool incredibly fast.
HKS GT Series Turbos are offered with a GT25 (T25) and/or T3 footprint and the turbine wheel is constructed of inconel. Inconel is a very expensive material that can withstand extremely high temperatures and is typically only used in the aero-space industry and on race cars. HKS GT Series Turbos are typically available in both external and internal Wastegate configurations.
The HKS Signature Series Turbos are Garrett based, but have re-engineered compressor and turbine wheels along with specific A/R and trim levels to maximize power output. The smallest of the HKS Signature Series Turbos is the TO4S which is rated to 550HP and the largest of the series is the HKS flagship turbo the T51R SPL which is rated to 1,000HP. The T51R class of turbos is broken up into two units, the T51R Kai and the T51R SPL which are rated to 800PS and 1,000PS respectively. Both the T51R Kai and SPL utilize a V-band flange and are available with a ball-bearing center cartridge that allows for 11% faster spool up then the standard sleeve bearing versions.
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