HKS 70019-AN105 Super Power Flow Intake for Nissan Skyline ECR33 Stagea RB25DET

Vehicle Fitment

• 1993-1998 Nissan Skyline ECR33 (RB25DET, DOHC turbocharged, RWD/4WD) - Skyline GTS-T and GTS-25T trims
• 1996-1998 Nissan Stagea WGC34 (RB25DET, DOHC turbocharged, AWD) - Series 1 (1996/10-1997/09) and Series 2 (1997/10-1998/08)
• 1996-1998 Nissan Stagea WGNC34 (RB25DET, DOHC turbocharged, AWD)

Fitment Notes

• RB25DET (turbocharged) applications only - this kit is designed for the turbocharged RB25DET; it does NOT fit naturally aspirated RB25DE variants of the same chassis
• Stagea WGC34 (1996/10-1997/09): Air duct cannot be installed - the OEM air duct is incompatible with this intake kit on the early WGC34. The filter will mount and function, but the air duct cover cannot be reinstalled
• This is a vehicle-specific SPF intake kit - it is not a universal filter assembly. The kit includes vehicle-specific inlet adapter and hardware for a direct bolt-on fit to the ECR33/WGC34/WGNC34 OEM intake mounting location
• Does NOT fit the Nissan Skyline R33 GT-R (BCNR33 RB26DETT) - that platform uses a different HKS SPF application (70019-AN107)
• Does NOT fit the Nissan Skyline R34 ECR34/ER34 without verification - the R34 GTS-T (ER34 RB25DET) may share similar intake architecture but confirm fitment separately before ordering
• All fitments are JDM market vehicles - verify engine code on export or grey-market versions before ordering

Features

• Super Honeycomb frame design - the open honeycomb structure provides 30% more filter intake surface area compared to the previous generation Super Power Flow frame, allowing more air to enter the filter face simultaneously and improving both airflow volume and filter efficiency
• Phi200-100mm filter assembly - 200mm outer diameter green dry polyurethane filter with 100mm inlet, matched to the RB25DET's intake pipe diameter for optimal air velocity and flow
• 3-layer dry polyurethane filter element - triple density construction provides improved filtration with low restriction; dry type requires no oil and is unaffected by moisture or fuel contact
• Streamlined inner frame with plastic sealing ring - the inner funnel frame is designed to reduce weight while directing airflow smoothly into the intake pipe; the plastic sealing ring at the frame base prevents contaminants from bypassing the filter element and provides structural support
• Aluminum backplate - reinforces the filter assembly against deformation under sustained high-velocity airflow
• Replaces the restrictive OEM airbox and intake ducting on the ECR33/WGC34/WGNC34 - removes the primary restriction in the intake path, improving throttle response and mid-range torque on the turbocharged RB25DET
• ECU resetting not required - the SPF intake is designed to work within the factory air flow meter range and feedback control system without requiring ECU recalibration on a stock or mildly modified RB25DET
• Improved intake sound - the removal of the airbox produces a more audible induction tone that accentuates the RB25DET's turbocharged character
• Washable and reusable filter element - clean with water or mild soap, dry completely, and reinstall; no replacement elements needed for routine maintenance
• Engineered and manufactured in Japan by HKS

Specifications

• Part Number: 70019-AN105
• Series: Super Power Flow (SPF)
• Application Type: Vehicle-specific intake kit
• Compatible Platforms: Nissan Skyline ECR33, Stagea WGC34/WGNC34
• Compatible Engine: RB25DET (DOHC, 2.5L turbocharged inline-6)
• Filter Size: Phi200-100mm
• Filter Color: Green
• Filter Type: Dry - 3-layer polyurethane
• Frame Type: Super Honeycomb frame
• Backplate: Aluminum
• Oil Required: No
• Washable / Reusable: Yes
• JAN Code: 4957266257197
• Package Weight: 1.86 kg
• Package Dimensions: 27.5cm x 24.5cm x 18.5cm
• Country of Manufacture: Japan

Included Components

• 1x HKS SPF 200-100mm green filter assembly (filter element, Super Honeycomb frame, aluminum backplate)
• Vehicle-specific inlet adapter and mounting hardware for ECR33/WGC34/WGNC34 RB25DET

Product Description

The HKS 70019-AN105 is a vehicle-specific Super Power Flow (SPF) air intake kit engineered for the turbocharged RB25DET engine in the Nissan Skyline ECR33 (1993-1998) and the Nissan Stagea WGC34/WGNC34 (1996-1998). Unlike the universal SPF assemblies (such as the 70019-AK105 or 70019-AK106), this kit includes vehicle-specific hardware that allows it to bolt directly onto the OEM intake mounting location of these platforms as a complete system - the filter assembly and inlet adapter replace the factory airbox and ducting in one installation. The OEM airbox is the single greatest restriction in the intake path of the stock RB25DET setup, and its removal produces immediate gains in throttle response and mid-range torque, along with the characteristically sporty induction sound that makes turbocharged RB engines compelling to drive.

The filter at the heart of the kit uses a 200mm outer diameter, 100mm inlet green dry polyurethane element with HKS's Super Honeycomb frame - an open honeycomb structure that provides 30% more surface area across the filter face than the previous SPF generation. The dry three-layer polyurethane construction requires no oil and resists moisture and fuel contact, while the streamlined inner funnel frame guides incoming air efficiently into the 100mm inlet pipe. The plastic sealing ring at the frame base ensures clean air delivery without contaminant bypass and supports the frame's structural integrity under sustained airflow. An aluminum backplate reinforces the entire assembly against deformation.

This kit is designed for the RB25DET (turbocharged) variant only - it does not fit naturally aspirated RB25DE models. The critical fitment note for Stagea WGC34 owners is that on the 1996/10-1997/09 (early Series 1) WGC34, the OEM air duct cover cannot be reinstalled after fitting this intake - the filter will mount and function correctly, but the duct itself is incompatible. For the R33 GT-R (BCNR33 RB26DETT), a separate HKS SPF application (70019-AN107) is required. The 70019-AN105 is a factory-produced to order item in Japan - confirm availability and lead time with your supplier before ordering.