Garrett GTX3576R Gen II Super Core (Replaces 836047): Specs, Fitment, and Is It Worth It

The Garrett GTX3576R Gen II Super Core is an 80mm billet single-turbocharger assembly positioned in the middle of Garrett's GTX Racing Supercore lineup, sitting between the smaller GTX3071R/GTX3076R range and the larger GTX3582R Gen II. It replaces the original GTX3576R Super Core (836047-5001S) under part number 851154-5003S, delivering the Gen II compressor wheel aerodynamic revision and updated bearing specification in the same platform architecture. The GTX3576R is the choice for single-turbo gasoline and performance diesel builds that have outgrown the 76mm-range GTX models but do not need the full 82mm compressor map of the GTX3582R -- its 80mm inducer covers approximately 500 to 800 horsepower depending on engine displacement, boost target, and the turbine housing A/R selected to match the build's exhaust characteristics. Like all GTX Gen II Super Cores, the GTX3576R ships as a compressor housing and CHRA assembly ready to receive a separately purchased turbine housing. This guide covers the Garrett GTX3576R Gen II specifications, turbine housing selection from the available Ni-Resist options, and how this Garrett Turbocharger fits into the broader GTX Gen II lineup for single-turbo build planning.

Specifications: Garrett GTX3576R Gen II Super Core

The GTX3576R Gen II Super Core (851154-5003S) covers the following specifications:

• Compressor inducer: 80mm billet aluminum GTX Gen II wheel (backswept blade profile with Gen II aerodynamic revision over original GTX3576R)
• Assembly type: Super Core -- CHRA and compressor housing; turbine housing purchased separately
• Replaces: 836047-5001S (original GTX3576R Super Core)
• Power range: approximately 500-800 horsepower on a single-turbo application, depending on engine displacement and boost target
• Turbine housing material: Ni-Resist (nickel-alloyed cast iron); the GTX3576R Gen II turbine housings use Ni-Resist construction, which handles the exhaust gas temperatures of high-output gasoline street and moderate track applications
• Available turbine housing A/R options: 0.83 (standard outlet) and 1.01 (reverse outlet); both V-Band inlet / V-Band outlet configuration
• CHRA option: GTX3576R Gen II CHRA (836019-5003S) available separately for builds requiring only the rotating cartridge assembly

The Ni-Resist turbine housing distinguishes the GTX3576R Gen II from the GTX3584RS, which uses stainless steel turbine housings for sustained high exhaust-gas-temperature applications such as repeated track sessions at maximum output. The GTX3576R's Ni-Resist housings are appropriate for street performance builds and occasional track use where exhaust temperatures remain within the range that cast iron alloy materials handle reliably. For builds at the GTX3576R's power range that will see sustained track use at or near peak output, the turbine housing material is a consideration when comparing the GTX3576R to the larger GTX3584RS platform.

The 1.01 A/R turbine housing carries the "Reverse" designation, indicating the turbine outlet faces in the reverse direction compared to the standard .83 A/R housing. This is a packaging consideration: the reverse outlet orientation allows the downpipe routing to exit in the opposite direction, which can simplify fabrication on certain engine layouts or single-turbo mounting positions where the standard outlet conflicts with chassis or suspension components. The internal A/R ratio and turbine performance characteristics are the same regardless of outlet orientation; the reverse designation affects only the housing geometry at the outlet flange.

Top Picks: GTX3576R Gen II Super Core, CHRA, and Turbine Housings

The Garrett GTX3576R Gen II Super Core (Replaces 836047-5001S) - Super Core Assembly (851154-5003S) is the complete Super Core assembly for new GTX3576R builds and for existing 836047-5001S replacements. It includes the Gen II compressor housing and CHRA and accepts the GTX3576R turbine housings listed below. For existing GTX3576R builds where the compressor housing is serviceable and only the cartridge needs replacement, the Garrett GTX3576R Gen II CHRA - Turbo Cartridge (836019-5003S) provides the Gen II rotating assembly without the compressor housing.

For turbine housing selection, the Garrett GTX3576R Gen II Turbine Housing Kit O/V V-Band / V-Band 0.83 A/R (Ni-Resist) (740902-0057) is the tighter A/R option that delivers faster turbine spool response at lower RPM -- the preferred choice for lower-displacement engines or builds where early boost onset is a priority. The Garrett GTX3576R Gen II Reverse Turbine Housing Kit O/V V-Band / V-Band 1.01 A/R (Ni-Resist) (740902-0058) provides a larger turbine flow area for better top-end power and reduced backpressure at peak RPM, with the reverse outlet orientation for packaging flexibility on certain chassis. Browse the complete Garrett GTX Series turbocharger catalog for Super Core assemblies and turbine housings across the full GTX Gen II lineup.

Match to the Build

• Single-turbo gasoline builds on a large inline-4 or small V6 targeting 600-800 horsepower: The GTX3576R's 80mm compressor map fills the range between the GTX3076R-range turbos (which peak around 550-600 hp on efficient builds) and the GTX3582R (which starts to shine above 700 hp on larger displacement engines); a built inline-4 or small V6 at Stage 2 or Stage 3 boost with adequate supporting modifications lands in the GTX3576R's efficiency range at this power level
• Street performance single-turbo builds where Ni-Resist turbine housing is appropriate: Street builds with occasional track days and no sustained maximum-output operation are well served by the GTX3576R's Ni-Resist turbine housings; the Ni-Resist material handles the thermal cycling of street performance use reliably, and builds at the GTX3576R's 500-800 hp range that are not making repeated full-power passes at a track do not require the stainless steel housings offered on the larger GTX3584RS platform
• Single-turbo swap on a platform where downpipe routing makes the reverse outlet preferable: The 1.01 A/R reverse outlet turbine housing addresses packaging challenges on certain engine layouts where the standard outlet orientation conflicts with frame rails, steering components, or existing exhaust routing; the reverse outlet provides the larger-A/R turbine flow area while solving the packaging problem the standard outlet creates
• Replacement for an existing GTX3576R Super Core (836047-5001S) that has accumulated high boost cycles: The 851154-5003S is the current production replacement for the 836047-5001S; builders returning to replace an existing GTX3576R Super Core install the 851154-5003S in the same turbine housing configuration and receive the Gen II compressor and bearing improvements as part of the replacement

Signs the Current Turbo Is Undersized or Worn

• Compressor surge at peak boost on the existing single turbo -- a stutter or flutter at wide-open throttle where power is at maximum; the current compressor operating past its surge line indicates the build has exceeded the existing turbo's flow capacity; the GTX3576R's 80mm Gen II compressor extends the surge line substantially above smaller GTX3071R and GTX3076R range wheels
• Power plateau at the top of the RPM range on a build that is fueled and boosted for higher output -- the existing turbo reaching maximum mass flow before the engine's fueling and boost capability is fully realized; a step to the GTX3576R raises the compressor flow ceiling to allow the build to produce the power level the calibration and supporting hardware are targeting
• Bearing noise or shaft play on the existing single turbo -- mechanical wear in the CHRA producing audible grinding or measurable shaft movement; a bearing-worn turbo on an active performance build requires replacement before continued operation sends debris into the engine through the intake or oil return; the GTX3576R Gen II CHRA (836019-5003S) covers cartridge-only replacement when the compressor housing is undamaged, or the full 851154-5003S Super Core replaces the complete assembly
• Oil consumption or seal leak at the compressor housing on a high-cycle single-turbo build -- shaft seal wear at the compressor side allowing oil into the intake charge; the GTX3576R Gen II Super Core restores fresh seals and the updated Gen II bearing specification as a complete assembly replacement

Frequently Asked Questions

How does the GTX3576R Gen II compare to the GTX3582R Gen II?

The GTX3576R Gen II uses an 80mm compressor inducer while the GTX3582R Gen II uses an 82mm inducer. The 2mm difference moves the surge line and raises the peak mass flow ceiling, making the GTX3582R the appropriate selection for builds pushing above approximately 750-800 hp or for larger-displacement engines that generate more exhaust flow at peak RPM. The GTX3576R is the correct choice when the power target and engine displacement fit within the 500-800 hp range and the Ni-Resist turbine housing material is appropriate for the build's intended use. Both models use the same Gen II platform architecture and accept their respective turbine housings through the same V-Band connection interface.

Bottom Line

The Garrett GTX3576R Gen II Super Core (851154-5003S) is the 80mm single-turbo Super Core for builds in the 500-800 horsepower range that fit between the GTX3076R-range turbos and the larger GTX3582R. It replaces the 836047-5001S with Gen II compressor and bearing improvements, pairs with Ni-Resist V-Band turbine housings in .83 and 1.01 A/R, and offers a CHRA-only option for cartridge service on existing GTX3576R builds.