Standard T04S Frame Compressor housing for GT3582R w/4" inlet and cast-in Anti-surge

This is Garrett’s purpose-built T04S frame compressor housing engineered specifically for the GT3582R turbocharger, designed for enthusiasts and builders who demand a wider usable powerband without sacrificing top-end airflow. Its cast-in ported shroud anti-surge design makes it the ideal choice for anyone looking to extend compressor efficiency and reduce surge on aggressively boosted applications. Available in standard or polished finish, it’s built to match the performance ambitions of serious GT3582R-based builds. Specifications Frame Size: T04S Compatible Turbo Model: GT3582R A/R Ratio: 0.70 Inlet Size: 4″ Outlet Size: 2.5″ Feature: Cast-in ported shroud (anti-surge) Garrett P/N: 786644-0001 Alternate P/N: ATP-HSG-559 (Black Powder Coat Option) Performance & Application Built for the GT3582R platform, this compressor housing is engineered for high-boost, high-airflow applications where compressor surge can limit both drivability and reliability. The integrated cast-in ported shroud anti-surge design allows the compressor to operate efficiently across a broader range of conditions, improving response at the edges of the map without compromising peak flow. It’s a smart upgrade path for builders running the GT3582R who want more usable performance from their existing turbo platform. Frequently Asked Questions What turbo model is this compressor housing designed for? This compressor housing is designed for the Garrett GT3582R turbocharger. What is the A/R ratio of this housing? The A/R ratio is 0.70. What size are the inlet and outlet? The housing features a 4″ inlet and a 2.5″ outlet. What does the anti-surge feature refer to? The housing includes a “cast-in” ported shroud, which is the anti-surge feature designed into this compressor housing. Is a black powder coat option available? Yes, a black powder coat option is available under the part number ATP-HSG-559. For GT3582R builds demanding a wider, more forgiving compressor map without giving up top-end performance, this T04S frame housing with cast-in anti-surge is the correct engineering choice.