Supertech SIVN-1025-8 – Black-Nitrided Intake Valve Set (Subaru EJ25 SOHC, NA)

Supertech’s SIVN-1025-8 kit contains eight performance intake valves engineered for naturally-aspirated Subaru EJ25 SOHC engines built between 1999 and 2012 (Impreza, Forester, Legacy, Outback, Baja). Each valve is forged from EV8 (21-4N) stainless steel, then finished with a Black Nitride surface that hardens the stem, lowers friction and boosts temperature resistance.

Key Features

  • 37 mm head (+1 mm oversize) delivers a larger curtain area for improved airflow and stronger top-end power.

  • Black Nitride coating (~52 HRC) creates a slick, wear-resistant surface that extends guide life and resists valve float at high RPM.

  • One-piece forged construction eliminates weld seams, ensuring superior fatigue strength under sustained high-load operation.

  • Single-groove keeper design is compatible with most Supertech and OEM spring/retainer packages for straightforward installation.

  • Supplied as a complete set of 8 valves—replaces every intake valve in the four-cylinder head.

Technical Specifications

Parameter Value
Valve type Intake
Head diameter 37.00 mm (+1 mm)
Stem diameter 6.00 mm (nominal)
Overall length 120.6 mm
Material EV8 (21-4N) stainless steel
Surface treatment Black Nitride
Keeper style Single groove
Pieces per kit 8

Vehicle Compatibility

Brand Model Generation / Chassis Engine
Subaru Baja 1999-2012 EJ25 SOHC
Subaru Forester 1999-2012 EJ25 SOHC
Subaru Impreza 1999-2012 EJ25 SOHC
Subaru Legacy 1999-2012 EJ25 SOHC
Subaru Outback 1999-2012 EJ25 SOHC
SUPERTECH

SUPERTECH

Product Title: SUPERTECH High-Performance Engine Oil – Ultimate Protection for Car Enthusiasts Introducing SUPERTECH High-Performance Engine Oil, the premium choice for car enthusiasts seeking unparalleled engine protection and performance. Designed to meet the demands of high-performance vehicles, SUPERTECH ensures your engine runs smoothly and efficiently, enhancing both longevity and power. Key Features and Benefits: - Advanced Synthetic Formula: Provides superior lubrication and reduces engine wear, ensuring optimal performance under extreme conditions. - High Viscosity Stability: Maintains consistent viscosity across a wide temperature range, delivering reliable protection in both hot and cold climates. - Enhanced Fuel Efficiency: Formulated to minimize friction, helping you achieve better fuel economy without sacrificing power. - Superior Cleaning Agents: Keeps your engine clean by preventing sludge and deposits, promoting a longer engine life. - Compatibility with All Engine Types: Suitable for both gasoline and diesel engines, making it the versatile choice for all car enthusiasts. With SUPERTECH High-Performance Engine Oil, you can trust that your vehicle is receiving the best care possible. Don’t compromise on quality—experience the difference that premium engine oil can make. Upgrade your engine's performance today and feel the power of SUPERTECH. Order now and give your car the protection it deserves!

Supertech Subaru EJ25 (w/o Turbo) Black Nitrided Intake Valve - Set of 8

Brand: SUPERTECH Product id: 72302 MPN: ST-SIVN-1025-8
EAN: 5903713182818
Availability: Available to order
223.34€
221.11€ Excl. VAT: 182.73€
EU Shipping — No Import Taxes
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Tags: Engine\By Car Make\Subaru\EJ25,

Brand Model Generation Engine
Subaru Baja 1999-2012 EJ25 SOHC
Subaru Forester 1999-2012 EJ25 SOHC
Subaru Impreza 1999-2012 EJ25 SOHC
Subaru Legacy 1999-2012 EJ25 SOHC
Subaru Outback 1999-2012 EJ25 SOHC

SUPERTECH

Product Title: SUPERTECH High-Performance Engine Oil – Ultimate Protection for Car Enthusiasts Introducing SUPERTECH High-Performance Engine Oil, the premium choice for car enthusiasts seeking unparalleled engine protection and performance. Designed to meet the demands of high-performance vehicles, SUPERTECH ensures your engine runs smoothly and efficiently, enhancing both longevity and power. Key Features and Benefits: - Advanced Synthetic Formula: Provides superior lubrication and reduces engine wear, ensuring optimal performance under extreme conditions. - High Viscosity Stability: Maintains consistent viscosity across a wide temperature range, delivering reliable protection in both hot and cold climates. - Enhanced Fuel Efficiency: Formulated to minimize friction, helping you achieve better fuel economy without sacrificing power. - Superior Cleaning Agents: Keeps your engine clean by preventing sludge and deposits, promoting a longer engine life. - Compatibility with All Engine Types: Suitable for both gasoline and diesel engines, making it the versatile choice for all car enthusiasts. With SUPERTECH High-Performance Engine Oil, you can trust that your vehicle is receiving the best care possible. Don’t compromise on quality—experience the difference that premium engine oil can make. Upgrade your engine's performance today and feel the power of SUPERTECH. Order now and give your car the protection it deserves!