This replacement diaphragm is engineered specifically for the integrated Compressor Recirculation Valve (CRV) found on BorgWarner EFR (Engineered For Racing) series turbochargers. Over time, constant heat cycles and high-boost operation can fatigue the original rubber, leading to tears that cause boost leaks and diminished throttle response.

Installing a fresh CRV diaphragm restores the turbocharger's ability to properly recirculate air during throttle lift-off. This prevents compressor surge, protects the compressor wheel from axial load spikes, and ensures your turbo stays on the boost threshold for better recovery between shifts. It is a vital maintenance component for any EFR-equipped vehicle experiencing erratic boost behavior.

• Genuine BorgWarner replacement component
• Compatible with all BorgWarner EFR series turbochargers featuring an integrated CRV
• Restores factory boost response and pressure management
• High-temperature resistant elastomer construction
• Direct-fit service part for the internal blow-off valve assembly

The BorgWarner EFR 8370 SuperCore assembly is a premium turbocharger core designed for high-performance racing applications where weight reduction and boost response are critical. This assembly utilizes a lightweight aluminum bearing housing, providing a significant weight advantage over traditional iron units without compromising the performance standards of the EFR series.

As an EFR (Engineered For Racing) component, the 8370 SuperCore consists of the compressor housing and the center housing rotating assembly (CHRA). This modular design allows builders to pair the high-flow 8370 compressor stage with their choice of compatible turbine housings to match specific engine displacement and power requirements.

• Manufacturer: BorgWarner
• Series: EFR (Engineered For Racing)
• Model: 8370
• Component: SuperCore Assembly
• Housing Material: Aluminum

Please note: This is a SuperCore assembly only. A compatible EFR turbine housing is required to complete the turbocharger installation.

The BorgWarner AirWerks SX-E S200SX-E 7670 SuperCore assembly provides a high-efficiency foundation for custom turbocharger configurations. As part of the performance-driven SX-E line, this unit is engineered for faster transient response and increased flow capacity over standard S200 frames. A SuperCore includes the compressor cover and the complete center housing rotating assembly (CHRA), allowing you to pair the unit with a turbine housing that matches your engine's displacement and A/R requirements.

• Forged Milled Compressor Wheel (FMW): Features advanced aerodynamics for improved airflow and structural integrity during high-boost operation.
• Integrated Speed Sensor Port: Pre-machined compressor housing allows for easy installation of a turbo speed sensor.
• 360-Degree Thrust Bearing: Enhanced thrust surface area provides increased durability and reliability in performance applications.
• Optimized Compressor Cover: Includes a pre-machined boost port and improved inlet geometry for maximum efficiency.
• Modular Design: Does not include a turbine housing, giving builders total flexibility in exhaust side selection.

This 7670 SuperCore is ideal for mid-range power builds where compact sizing and rapid spooling are critical for performance.

The BorgWarner AirWerks S200SX-E 7070 SuperCore offers a high-performance foundation for custom turbocharger configurations. Engineered as part of the SX-E performance line, this assembly is designed to deliver improved transient response and increased durability under high-boost conditions compared to standard AirWerks units. A SuperCore includes the compressor housing and the complete Center Housing Rotating Assembly (CHRA), allowing for precise pairing with a turbine housing that matches your specific manifold and power requirements.

• Forged milled compressor wheel (FMW) for superior aerodynamics and structural integrity
• High-load 360-degree thrust bearing system for enhanced reliability
• Integrated speed sensor port and pre-machined boost signal port for easier data logging
• Includes compressor cover and CHRA rotating assembly
• Note: Turbine housing is not included and must be purchased separately
• Manufacturer Part Number: S200SX-E 7070

The BorgWarner S300SX-R 68mm SuperCore (8880) is a high-performance turbocharger assembly engineered for maximum airflow and efficiency. As part of the SX-R lineup, this unit features advanced aerodynamics designed to outperform standard S300SX units. This SuperCore includes the compressor cover and the complete rotating assembly (CHRA), allowing you to select and install a turbine housing that specifically matches your engine's displacement and power goals.

• SX-R series aerodynamics for improved compressor maps and higher flow capacity
• 68mm inducer diameter forged milled compressor wheel (FMW) for increased durability and response
• Heavy-duty journal bearing system designed for high-boost applications
• Integrated speed sensor port and pre-machined boost signal port
• Pre-balanced CHRA ready for installation into compatible turbine housings
• Manufacturer Part Number: 8880

The BorgWarner EFR 8474 SuperCore Assembly (B2 Frame) provides a high-performance foundation for custom turbocharger configurations. This SuperCore consists of the compressor cover, compressor wheel, and the complete Center Housing Rotating Assembly (CHRA), featuring a durable cast iron bearing housing designed for superior thermal stability and longevity in high-heat racing environments.

Engineered for rapid response and high flow, the EFR 8474 series balances advanced aerodynamics with robust construction. This assembly allows builders to select their preferred turbine housing A/R and flange type to match specific engine displacements and power goals. As part of the EFR (Engineered For Racing) line, it incorporates premium materials and tight tolerances for maximum reliability under heavy boost.

• Manufacturer: BorgWarner
• Series: EFR (Engineered For Racing)
• Model: 8474
• Frame Size: B2
• Bearing Housing: Cast Iron
• Assembly Type: SuperCore (Includes Compressor Cover + CHRA)

The BorgWarner AirWerks S300SX-R 64mm SuperCore (8476) is a high-performance foundation for custom turbocharger configurations. This SuperCore assembly includes the compressor housing and a fully balanced center housing rotating assembly (CHRA), allowing you to pair it with the specific turbine housing required for your engine's displacement and response needs. As an "R" designated model, it features an optimized billet compressor wheel designed for increased mass flow and higher efficiency compared to standard SX series units.

• BorgWarner AirWerks S300SX-R Series
• 64mm compressor wheel inducer diameter
• Billet compressor wheel for improved aerodynamics and durability
• Fully balanced CHRA for high-RPM reliability
• 360-degree thrust bearing for enhanced load capacity under high boost
• Manufacturer Part Number: 8476

Engineered for professional builds, this assembly provides the core components needed to construct a high-output turbocharger while maintaining the reliability BorgWarner is known for in competitive and performance street applications.

This BorgWarner EFR Low Boost Wastegate Actuator is engineered for precise boost management on EFR series turbochargers. Designed for applications requiring lower target boost pressures, this canister ensures stable wastegate valve operation and consistent performance across the RPM range.

Built to the exacting standards of the Engineered For Racing (EFR) line, this actuator is a direct-fit component for specific turbine housing configurations. It is optimized for use with .64 A/R housings featuring either 55mm or 58mm turbine wheels, providing the necessary stroke and spring tension for accurate internal wastegate control.

• Manufacturer: BorgWarner
• Series: EFR (Engineered For Racing)
• Boost Configuration: Low Boost
• Turbine Wheel Compatibility: 55mm and 58mm TW
• Housing Fitment: .64 A/R Turbine Housings
• Component Type: Internal Wastegate Actuator Canister

This genuine BorgWarner K03 Turbocharger Repair Kit (MPN 53037110000) is designed to restore original equipment performance and reliability to your turbocharger unit. As a direct replacement service kit, it provides the critical internal components necessary to refresh worn bearings and seals, addressing common oil consumption and shaft play issues.

• Genuine BorgWarner components for exact fitment and OE tolerances
• Designed specifically for K03 series turbocharger maintenance
• Includes high-precision bearings and sealing rings to ensure long-term durability
• Manufacturer Part Number: 53037110000

Professional installation is recommended for balancing and proper assembly of the turbocharger center housing rotating assembly (CHRA).

The BorgWarner EFR (Engineered For Racing) B1 7163F is a high-performance turbocharger engineered for rapid boost response and high-end flow capacity within a compact frame. This unit features a 0.85 A/R stainless steel turbine housing designed for V-band inlet and outlet configurations, simplifying installation and ensuring a secure, leak-free seal.

• Series: EFR B1 (Engineered For Racing)
• Model: 7163F
• Turbine Housing: 0.85 A/R with V-band inlet
• Wastegate: Internally wastegated (WG)
• Bearing Type: Dual ceramic ball bearing for reduced friction and faster spool
• Turbine Wheel: Gamma-Ti (Titanium Aluminide) for extremely low inertia
• Manufacturer Part Number: 11639880006

Built to handle the rigors of competitive driving, the EFR 7163F utilizes a high-flow compressor wheel and an integrated Compressor Recirculation Valve (CRV) to prevent surge during throttle lift. It is an ideal solution for applications requiring a balance of mid-range torque and high-horsepower potential.

Ensure a secure, leak-free connection between your turbine housing and center section with the BorgWarner EFR Turbine Housing (TH) Clamp Kit. This specialized hardware kit is engineered specifically for EFR series turbochargers featuring aluminum bearing housings (BH), where precise clamping force and fitment are critical for high-performance operation and thermal management.

This kit provides the necessary hardware to maintain a reliable seal under high boost and exhaust temperatures. It is a critical replacement item during turbocharger reassembly or when swapping turbine housings to ensure the assembly meets BorgWarner's original equipment specifications.

• Manufacturer Part Number: 59007119005
• Application: BorgWarner EFR Series Turbochargers
• Housing Compatibility: Specifically for Aluminum Bearing Housing (BH) models
• Component Type: Turbine Housing (TH) Clamp Kit
• Genuine BorgWarner service hardware for precise fitment and durability

This genuine BorgWarner AirWerks S400SX turbine housing is engineered for high-performance applications requiring precise exhaust gas management. It serves as a direct replacement or an upgrade to tune the transient response and power delivery of your S400SX series turbocharger.

The 1.00 A/R (Area/Radius) ratio offers a balanced performance profile, providing sufficient flow for high-horsepower targets while maintaining manageable spool times. This housing features a T4 divided inlet to maximize exhaust pulse energy and a VTF (V-Band Turbine Flange) outlet for a secure, leak-free connection and simplified downpipe installation. It is precision-machined specifically for the 87mm turbine wheel.

• Manufacturer Part Number: 178788
• Series: S400SX / SX
• Turbine Wheel Diameter: 87mm
• A/R Ratio: 1.00
• Inlet Flange: T4 Divided
• Outlet Style: VTF (V-Band)
• Material: High-temperature resistant cast iron

The BorgWarner EFR Series Turbocharger Speed Sensor Kit (179430) provides precise, real-time data on turbocharger rotational speed. This kit is essential for tuners and performance enthusiasts looking to monitor wheel RPM, allowing for precise compressor map tracking and the prevention of overspeed conditions that can lead to catastrophic turbo failure.

Designed specifically for the EFR line, this sensor installs directly into the pre-machined speed sensor port found on EFR compressor covers. This eliminates the need for custom machining or guesswork, ensuring an accurate signal for your ECU or data logger.

• Compatible with all BorgWarner EFR Series turbochargers
• Provides high-frequency RPM data for advanced boost control and tuning
• Protects against overspeeding by providing actual wheel speed metrics
• Engineered for direct-fit installation into factory EFR sensor ports
• Manufacturer Part Number: 179430

Kit Includes: Speed sensor, wiring harness pigtail, and necessary mounting hardware.

Fits select Mini Cooper S models equipped with the EP6 HP engine. This genuine BorgWarner SX K03 turbocharger is an OE-quality replacement designed to restore factory performance and reliability to your vehicle's forced induction system.

Built by the original manufacturer, this unit provides the exact functionality and performance specifications of the factory-installed equipment. It features a robust, water-cooled bearing housing for superior thermal management and durability under high-stress conditions. This aftermarket service turbo is an essential component for maintaining the boost characteristics and efficiency of the EP6 HP powerplant.

• Turbo Model: K03
• Manufacturer Part Number: 53039880163
• Direct replacement for K03-0118 units only
• Water-cooled bearing housing for improved heat dissipation
• OE-quality materials and manufacturing tolerances

Note: Proper installation requires a turbine housing outlet gasket (BMW/Mini Part No. 7 589 503).

Optimize your turbocharger's performance with this genuine BorgWarner SX S300 turbine housing. Engineered for precision and durability, this 1.00 A/R housing is designed specifically to accommodate 80mm turbine wheels. The Twin Flow (divided) volute design maximizes exhaust pulse energy, facilitating faster spool-up and improved boost response when paired with a divided manifold.

• Manufacturer Part Number: 179905
• Product Line: AirWerks SX S300 Series
• A/R Ratio: 1.00
• Turbine Wheel Diameter: 80mm
• Volute Configuration: Twin Flow (Divided)
• Material: High-temperature resistant cast housing

This housing is a direct replacement or tuning upgrade for S300SX units, providing the thermal stability and tight tolerances required for high-performance street and track applications. Ensure your setup matches the 80mm turbine wheel profile for correct clearance and efficiency.

Ensure precise wastegate operation and secure fitment with the BorgWarner EFR Actuator Bracket Kit (MPN 179429). This heavy-duty bracket is engineered specifically for use with EFR series turbochargers equipped with 83mm and 91mm compressor wheels.

A rigid mounting solution is critical for maintaining consistent boost control. This kit provides the necessary stability to prevent actuator flex or misalignment during high-vibration and extreme thermal cycles. It allows for the correct orientation and clocking of the wastegate actuator on compatible EFR housings.

• Designed for BorgWarner EFR 83mm and 91mm CW turbochargers
• Ensures rigid, secure mounting for internal wastegate actuators
• High-strength construction to withstand engine bay heat and vibration
• Direct-fit replacement for mounting hardware
• Manufacturer Part Number: 179429

Secure your wastegate actuator with precision using the BorgWarner EFR Actuator Bracket Kit (MPN 179428). This heavy-duty mounting solution is engineered specifically for BorgWarner EFR-series turbochargers with compressor wheel sizes ranging from 62mm to 76mm. It is designed to accommodate turbine housings (TH) with 0.83 and 0.94 A/R ratios in clockwise (CW) configurations.

Proper actuator alignment is critical for maintaining stable boost pressure and preventing wastegate arm binding. This bracket is manufactured to withstand the extreme thermal cycling found in the turbocharger environment, ensuring the actuator remains rigid under high-vibration conditions. It replaces worn or damaged factory brackets to restore original wastegate geometry and performance.

• Manufacturer Part Number: 179428
• Compatibility: BorgWarner EFR 62mm to 76mm Turbos
• Housing Fitment: 0.83 and 0.94 A/R Turbine Housings (TH)
• Rotation: Clockwise (CW)
• Material: High-strength steel construction for thermal stability

Maintain precise electronic boost management with the BorgWarner EFR Boost Control Solenoid Valve (BCSV) Kit. Engineered specifically for the EFR (Engineered For Racing) turbocharger series, this 3-port solenoid allows the ECU to accurately modulate wastegate signal for optimized boost curves and peak engine performance.

This kit is a direct replacement for the original BCSV found on EFR turbochargers, ensuring factory-level integration and reliability in high-heat engine bay environments. Whether you are replacing a failed unit or completing a custom turbo installation, this genuine BorgWarner component provides the fast response times and durability required for high-performance applications.

• Genuine BorgWarner EFR service part
• Manufacturer Part Number: 179425
• Optimized for electronic boost control systems
• Includes solenoid valve, mounting bracket, and necessary hardware
• Compatible with all BorgWarner EFR series turbochargers

Ensure a secure, leak-free connection between your turbocharger components with the BorgWarner EFR Series Turbine Housing Installation Kit. This genuine hardware set (MPN 179423) is designed specifically for EFR series turbochargers, providing the critical fasteners required to mount the turbine housing to the center housing rotating assembly (CHRA).

Engineered to withstand extreme thermal expansion and high-vibration environments, this kit provides the hardware necessary to maintain proper torque specs during intense heat cycles. The included locking plates (straps) prevent bolts from backing out, protecting your turbocharger system from exhaust leaks and potential hardware failure.

• Specifically designed for BorgWarner EFR Series turbochargers
• Includes high-strength mounting bolts and specialized locking straps
• Engineered to resist loosening under extreme manifold temperatures
• Essential for new turbo installations or housing swaps
• Genuine BorgWarner component: MPN 179423

The BorgWarner EFR 8374 (MPN 179393) is a high-performance turbocharger engineered for professional racing and street use, delivering a balance of rapid boost response and high-end flow. Built on the B2 frame, this unit features a 1.05 A/R twin-scroll turbine housing, ideal for divided exhaust manifolds to maximize pulse energy and minimize lag in 500-800 horsepower applications.

• Gamma-Ti Turbine Wheel: Titanium Aluminide construction significantly reduces rotational inertia for near-instant response.
• Dual Ceramic Ball Bearings: Provides low friction and high durability under extreme thermal loads.
• Forged Milled Wheel (FMW): The compressor wheel is machined from high-strength forged aluminum for increased pressure ratio capability.
• 1.05 A/R Turbine Housing: Stainless steel construction with a Twin Scroll T4 inlet and V-band turbine flange (VTF) outlet.
• Integrated Oil Control: Includes a built-in oil orifice to ensure proper lubrication without the need for external restrictors.

This SuperCore configuration includes the compressor and turbine assembly with the 1.05 A/R stainless steel housing. It is designed for external wastegate setups.

The BorgWarner EFR 7670 (MPN 179390) is an EFR Series B2 turbocharger engineered for high-response performance applications ranging from 400 to 600 horsepower. Built with a Gamma-Ti (Titanium Aluminide) turbine wheel and dual ceramic ball bearings, this unit provides exceptionally low rotational inertia for lightning-fast spool-up and immediate transient response.

This configuration features a 0.92 A/R twin-scroll (VTF) stainless steel turbine housing designed for superior heat retention and maximum pulse energy efficiency. The integrated internal wastegate, compressor recirculation valve (CRV), and boost control solenoid simplify your engine bay layout by eliminating the need for bulky external plumbing and components.

• Manufacturer Part Number: 179390
• Compressor Wheel Inducer: 57.2mm
• Compressor Wheel Exducer: 70mm
• Turbine Wheel Outer Diameter: 70mm
• Turbine Housing: 0.92 A/R Twin Scroll
• Wastegate Type: Internal
• Bearing Type: Dual Ceramic Ball Bearing
• Turbine Wheel Material: Gamma-Ti
• Housing Material: Investment Cast Stainless Steel

The BorgWarner EFR 6758 B1 Series turbocharger is engineered for high-performance applications where rapid response and durability are paramount. As part of the Engineered For Racing (EFR) line, this unit features a Gamma-Ti turbine wheel for low rotational inertia and a dual ceramic ball bearing cartridge for exceptional spool-up and reliability under high heat and heavy load.

• Manufacturer Part Number: 179388
• Turbine Housing: 0.64 A/R Stainless Steel with V-Band Outlet (VO)
• Wastegate: Integrated Internal Wastegate (WG)
• Turbine Wheel: Gamma-Ti (Titanium Aluminide) for reduced rotational inertia
• Bearing System: Dual Ceramic Ball Bearing for increased efficiency
• Compressor: Forged Milled Wheel (FMW) technology
• Integrated Features: Built-in Compressor Recirculation Valve (CRV) and boost control solenoid

The BorgWarner EFR 6758 B1 Series Super Core (MPN 179375) is the core assembly of choice for builders seeking elite transient response and mid-range power. As a Super Core, this package includes the complete center housing rotating assembly (CHRA) and compressor housing, allowing you to select the specific turbine housing (A/R and flange) required for your custom manifold setup.

• Gamma-Ti Turbine Wheel: Constructed from Titanium Aluminide to drastically reduce rotational inertia, providing near-instantaneous boost response.
• Forged Milled Compressor Wheel (FMW): Features a 53.9mm inducer and 67mm exducer, engineered for high-pressure efficiency and durability.
• Dual Ceramic Ball Bearings: Offers minimal friction and high load capacity for improved spool and long-term reliability under racing conditions.
• Integrated Components: Equipped with a built-in Compressor Recirculation Valve (CRV) and Boost Control Solenoid (BCS) to simplify plumbing and reduce engine bay clutter.
• Technical Specs: B1 frame size; 58mm turbine wheel; includes speed sensor port and pre-machined mounting points.

Designed for the EFR (Engineered For Racing) line, this 6758 Super Core replaces worn units or serves as the heart of a new high-performance forced induction system.

The BorgWarner EFR 8374 B2 Turbocharger is engineered for high-performance racing and street applications that demand a balance of rapid boost response and high-end power. This B2 frame unit features a high-flow 8374 compressor wheel and a lightweight Gamma-Ti (Titanium Aluminide) turbine wheel designed to significantly reduce rotational inertia compared to traditional alloys.

This specific configuration includes a 0.92 A/R stainless steel turbine housing with a V-band Twin Flow (VTF) twin-scroll design, optimizing exhaust gas pulse energy for faster spooling. It comes equipped with an integrated internal wastegate (WG) and a compressor-mounted Boost Control Solenoid Valve (BCSV) to simplify plumbing and installation while maintaining precise control.

• Manufacturer Part Number: 179357
• Series: EFR (Engineered For Racing)
• Frame Size: B2
• Turbine Housing: 0.92 A/R VTF (Twin Scroll)
• Turbine Wheel Material: Gamma-Ti
• Wastegate Type: Internal (WG)
• Integrated Compressor Recirculation Valve (CRV)
• Dual ceramic ball bearing cartridge

The BorgWarner AirWerks S400SX SX Super Core (MPN 179352) provides the foundation for high-performance turbocharging on a heavy-duty frame. As a Super Core assembly, this unit includes the compressor housing, center housing rotating assembly (CHRA), and compressor wheel. It is designed for builders who want to pair a reliable S400 chassis with a specific turbine housing suited to their engine displacement and backpressure requirements.

This S400SX configuration features a 67.7mm inducer compressor wheel paired with a 91mm exducer. The 83mm turbine wheel provides excellent flow capacity for mid-to-high horsepower builds, utilizing BorgWarner’s proven journal bearing technology and severe-duty thrust bearings for long-term durability under high boost.

• Manufacturer Part Number: 179352
• Product Series: AirWerks S400SX SX
• Compressor Inducer: 67.7mm
• Compressor Exducer: 91mm
• Turbine Wheel Exducer: 83mm
• Assembly Type: Super Core (No turbine housing included)

Engineered for precision boost management, the BorgWarner EFR High Boost Wastegate Actuator (MPN 179287) is a critical upgrade or replacement for EFR series turbochargers. This high-rate actuator is specifically calibrated to maintain stable manifold pressure in high-performance applications, preventing premature wastegate opening and ensuring the turbo reaches its target boost curve efficiently.

• Designed for use with BorgWarner EFR turbine wheels ranging from 64mm to 80mm
• Optimized for fitment on .83 A/R turbine housings
• Heavy-duty spring tension for high boost targets and improved gate control
• Direct replacement for factory EFR internal wastegate components
• Manufacturer Part Number: 179287

Maintain precise boost control and consistent engine performance with the genuine BorgWarner EFR Medium Boost Wastegate Actuator (MPN 179286). This internal actuator canister is specifically engineered to regulate pressure within the EFR series turbocharger system, providing the reliable response needed for medium boost applications.

• Manufacturer Part Number: 179286
• Boost Range: Medium Boost configuration
• Turbine Housing Compatibility: Optimized for .83 A/R housings
• Turbine Wheel Range: Fits 64mm, 70mm, 74mm, and 80mm turbine wheels
• Application: Genuine BorgWarner EFR Series internal wastegate service/upgrade part

Built to withstand the high thermal loads of a turbocharger environment, this actuator features a durable canister and a precision-threaded rod for fine-tuning your wastegate crack pressure. Using a genuine BorgWarner component ensures factory-level tolerances and prevents common issues like boost creep or premature gate opening.

The BorgWarner EFR 6258 B1 (MPN 179150) is a high-response turbocharger from the Engineered For Racing series, designed for enthusiasts and racers seeking a compact footprint without sacrificing performance. This B1 frame turbo features a 62mm compressor wheel and a 58mm turbine wheel, delivering an ideal balance for small-displacement engines or twin-turbo applications requiring rapid transient response.

Built for durability and thermal efficiency, the 179150 features a stainless steel turbine housing with a 0.64 A/R and a V-band outlet for secure, leak-free exhaust plumbing. The internal wastegate design streamlines the installation by eliminating the need for external plumbing and gates. Inside, the Gamma-Ti turbine wheel significantly reduces rotational inertia, while dual ceramic ball bearings ensure low-friction operation and instant spool-up.

• Manufacturer Part Number: 179150
• Series: EFR (Engineered For Racing)
• Frame Size: B1
• Turbine Housing: 0.64 A/R with V-Band Outlet
• Wastegate: Integrated Internal Wastegate (WG)
• Turbine Wheel: Gamma-Ti (Titanium Aluminide) for low inertia
• Bearing Type: Dual Ceramic Ball Bearing
• Compressor Wheel: Forged Milled Wheel (FMW)
• Integrated Features: Compressor Recirculation Valve (CRV) and Boost Control Solenoid

The BorgWarner AirWerks S400SX series turbocharger (MPN 178855) is a high-performance solution engineered for custom forced-induction builds requiring significant airflow and durability. Featuring a 67.7mm compressor wheel inducer paired with a 91/83 turbine wheel configuration, this unit is designed to maximize efficiency in high-horsepower applications.

Built on the proven S400 frame, this turbocharger utilizes twin hydrodynamic journal bearings and a heavy-duty thrust bearing to ensure stability under high boost pressures. The S400SX series is a preferred choice for builders seeking a reliable, high-flowing turbo for universal racing or performance street applications.

• Manufacturer Part Number: 178855
• Series: AirWerks S400SX
• Compressor Inducer: 67.7mm
• Turbine Wheel: 91mm / 83mm
• Bearing Type: Twin hydrodynamic journal bearings
• Design: Extended Tip Technology for improved compressor map width and efficiency
• Fitment: Universal performance application

This genuine BorgWarner S400SX series turbine housing is engineered to optimize exhaust gas flow and manage backpressure in high-performance turbocharged applications. With a 1.25 A/R, this housing is specifically sized for large-displacement engines or high-RPM setups where maximizing top-end horsepower is the primary objective.

The housing features a T4 VTF (Volute Twin Flow) divided inlet, designed to maintain exhaust pulse energy and improve transient response when used with a divided manifold. Precision cast to withstand extreme thermal cycling, it provides a direct-fit solution for S400SX units equipped with an 87mm turbine wheel.

• Manufacturer Part Number: 178790
• Turbocharger Series: BorgWarner S400SX / SX
• Turbine Wheel Compatibility: 87mm
• Area/Radius (A/R): 1.25
• Inlet Flange: T4
• Scroll Configuration: VTF (Divided/Twin Scroll)