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Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished

SKU: INJSP1208P

Air Intake Kits

INJ SP Intake...

Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished

SKU: INJSP1208P

Air Intake Kits

INJ SP Intake...

A$645.31
Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.
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Description

The SP series of cold air intakes is Injen's flagship system in their lines of traditional aluminum cold air intake systems. Injen Technology is the world's first tuned air intake system and holds four (4) patents on the tuning process of an intake system, something no other manufacturer can claim. The SP series of cold air intakes feature many of Injen Technology's patented tuning process, including MegaRam (MR) Technology (Patents 7,359,795 and 7,669,571), Air Fusion (Patent 7,721,669), and many other innovations that keep Injen Technology at the forefront in the performance aftermarket.

Product Overview

Injen Technology has done it once again with this new short ram air intake for the 2018-2021 Subaru WRX STI Equipped with the H4-2.5L Turbo Engine. The Injen Technology SP1208 performance air intake system is the result of countless hours invested in research and development to provide a proven intake system designed to add power and performance to your STI. The Injen Technology SP1208 intake system is a direct replacement for that restrictive factory airbox and provides a engineered solution that allows that turbo to breathe deeply and produce it's full power potential with a simple drop-in install. To top it all off, no tune is required to get the power numbers noted!


Features and Benefits

  • Dyno Proven gains of up to 26 hp and 24 lb-ft. of torque
  • Short Ram Air Intake Design
  • Features Injen's patented MegaRam (MR) Technology
  • Injen's MR Technology provides massive power gains while maintaining A/F ratios
  • No additional tuning required and no check engine lights
  • Huge 3.250in mandrel-bent 6061-T6 aluminum intake tubing
  • Includes custom heat shield specifically designed for this application
  • Fully serviceable Injen SuperNano-Web dry air filter
  • Replacement air filter part number X-1059-BB
  • Optional Hydroshield part number 1040BLK
  • Available in multiple finishes
  • SP1208P (Polished)
  • SP1208WB (Wrinkle Black)
  • SP1208WR (Wrinkle Red)
  • Aggressive engine tone under full throttle
  • Smooth intake piping eliminates restrictions and improves airflow
  • Made in Pomona California, USA
  • Injen Technology Limited Lifetime Warranty
  • Note: This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.

Product Details

Black Hydroshield (Optional):1040BLK
Compatible Throttle Controller:PT0002B
Description:Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished
Filter Color:Blue
Filter Media:Dry SuperNano-Web
Grade Type:Performance
HP Gain:26
Heat Shield Included:Yes
Intake Color:Polished
Mounting Hardware Included:Yes
Part Number:injSP1208P
Patented Air Fusion Incorporated:No
Patented MR Technology Incorporated:Yes
Prop 65 (C, R or CR):CR
Prop 65 - Short Label:prop65_warning.jpg
Prop 65 Yes/No:Yes
Red Hydroshield (Optional):N/A
Replacement Filter Part Number:X-1059-BB
TQ Gain:24
Title:Injen Polished SP Aluminum Series Short Ram Air Intake System
Tube Material:T6-6061 Mandrel-bent aluminum intake tubing
Universal or Specific Fit:Specific

Part Type

Engine Short Ram Air Intake

Data: v4.2 - Upd: 2026-10-13 15:24:44

Features

  • Aggressive engine tone under full throttle
  • Available in multiple finishes
  • Dyno Proven gains of up to 26 hp and 24 lb-ft. of torque
  • Features Injen's patented MegaRam (MR) Technology
  • Fully serviceable Injen SuperNano-Web dry air filter
  • Huge 3.250in mandrel-bent 6061-T6 aluminum intake tubing
  • Includes custom heat shield specifically designed for this application
  • Injen Technology Limited Lifetime Warranty
  • Injen's MR Technology provides massive power gains while maintaining A/F ratios
  • Made in Pomona California, USA
  • No additional tuning required and no check engine lights
  • Note: This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.
  • Optional Hydroshield part number 1040BLK
  • Replacement air filter part number X-1059-BB
  • Short Ram Air Intake Design
  • Smooth intake piping eliminates restrictions and improves airflow
  • SP1208P (Polished)
  • SP1208WB (Wrinkle Black)
  • SP1208WR (Wrinkle Red)

Specifications

Product Attributes - UPC
843115029739
Product Attributes - Brand
Injen
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Part Type
Air Intake Kits
Product Attributes - Tube Color
Polished
Product Attributes - Filter Color
Blue
Product Attributes - Product Line
Injen SP Series Speed Pro Short Ram Intake Systems
Product Attributes - Sleeve Color
Black
Product Attributes - Tube Material
Aluminum
Product Attributes - Air Filter Type
Dry
Product Attributes - Filter End Cap Color
Black
Product Attributes - Air Intake Filter Material
Synthetic
Product Attributes - Manufacturer's Part Number
SP1208P

Reference Information

Brand Name/s Injen
StreetFX SKU injSP1208P
SFX Item ID 4243866
Supplier Item Code 4243866
Manufacturer SKU SP1208P
Manufacturer UPC 843115029739
Alternative References 2.5L

Brochures

Compatibility

Application Data
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelBASE
    Beginning Year2018
    Ending Year2021
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelBASE
    Beginning Year2018
    Ending Year2021
    Engine TypeH4
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelKANRAI EDITION
    Beginning Year2020
    Ending Year2020
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelLIMITED
    Beginning Year2018
    Ending Year2021
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelLIMITED
    Beginning Year2018
    Ending Year2021
    Engine TypeH4
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelS209
    Beginning Year2019
    Ending Year2019
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelS209
    Beginning Year2019
    Ending Year2019
    Engine TypeH4
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelSPORT-TECH
    Beginning Year2018
    Ending Year2021
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelSPORT
    Beginning Year2018
    Ending Year2021
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelSTI
    Beginning Year2018
    Ending Year2018
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelSTI
    Beginning Year2020
    Ending Year2021
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelTYPE RA
    Beginning Year2018
    Ending Year2018
    Engine TypeH4
    Liter2.5
    CC2458
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc
    Application NotesAspiration: Turbocharged
  • UniversalNo
    MakeSUBARU
    ModelWRX STI
    SubmodelTYPE RA
    Beginning Year2018
    Ending Year2018
    Engine TypeH4
    Engine FamilySubaru 4-cylinder
    Engine Size2.5L/2458cc

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