Injen® SP1204WR - SP Series Wrinkle Red Cold Air Intake System

55 reviews / Item # mpn1570818 View Similar Products
Injen® - SP Series Air Intake System
Injen® - SP Series Air Intake SystemInjen® - Installation InstructionINJEN® - Sisters installing an Injen Air Intake 602x420Made In USAInjen Authorized Dealer
In Stock - Ships in 2 to 3 days
Vehicle Specific
Fits Following Model(s):
  • Please Select Vehicle Below
Select Vehicle
Add To Cart
Interested in this item?
Have a Question? 800.505.3274
Ask a Specialist: Live Chat
Authorized Dealer:Injen
Low Prices. Price match guarantee
Guaranteed Fitment. Always the correct part
In-House Experts. We know our products
Easy Returns. Quick & Hassle Free
Select VehicleSelected Vehicle
Do not see your vehicle here?   View similar products

Product Details

Learn everything you want to know about this product
to make an informed purchase.

Injen Air Intake Systems

SP Series Wrinkle Red Cold Air Intake System (SP1204WR) by Injen®. Filter Color: Blue. Tube Finish: Wrinkle Red. System Type: Cold Air Intakes. HP Gain: up to 33.2 hp. TQ Gain: up to 31.2 lbs./ft. The SP Series Cold Air Intake System is made for the enthusiast who wants maximum horsepower from a tuned cold air intake system. This cold air system positions a high-flow air filter behind the bumper, where it can take in cooler, denser air. Cooler air contains more oxygen for more complete combustion and more horsepower.

Injen FAQsInjen About


  • Filter Color: Blue
  • Tube Finish: Wrinkle Red
  • System Type: Cold Air Intakes
  • HP Gain: up to 33.2 hp
  • TQ Gain: up to 31.2 lbs./ft.


  • Delivers more oxygen to the combustion chamber by drawing in cooler air
  • Uses the patented MR Technology tuning process to ensure the air/fuel ratio is within optimum limits
  • Custom designed and engineered to deliver maximum power for each specific vehicle
  • Improves acceleration and fuel economy
  • Every system includes the EA Nanofiber dry air filter
  • Air intake pipe constructed of mandrel-bent 6061 aluminum for smooth airflow
  • Comes complete with all necessary mounting hardware and comprehensive installation instructions
  • Street Legal in all States
  • Backed by a Limited Lifetime Warranty
  • Proudly manufactured in the USA

It's a well known fact that cooler, denser air contains more oxygen, and more oxygen in your engine's air intake charge means better combustion and more power. Hot air contains fewer oxygen molecules, and if your engine is fed hot air there will be less oxygen and therefore less power. Yet that's exactly what your engine gets with the factory air intake system! The solution to this problem is to install an Injen SP Series Cold Air Intake System.

Injen starts the power improvement process by positioning an Injen EA Nanofiber dry air filter behind the front bumper. Here, this free-flowing filter can take in the coolest air possible and funnel it through smooth, mandrel-bent 6061 aluminum alloy tubing. Injen designs and repeatedly tests its systems for each application to make sure they're the least restrictive, all the way to the throttle body. So, instead of power-robbing hot air squeezing through a restrictive air filter and intake duct, your engine is taking in huge quantities of cool air surging through free-flowing tubing. The result is increased horsepower and torque, and improved performance.

MR technology

But unlike other cold air intake systems, Injen's patented MR (Mega Ram) Technology attains this increased intake airflow and performance while maintaining a safe air/fuel ratio. Injen steps down the diameter of the intake tube where the Mass Air Flow (MAF) sensor mounts, enabling the sensor to detect airflow within established parameters. The engine control computer can then maintain the proper air/fuel ratio and optimize horsepower and torque. Simply put, MR Technology tunes the intake system to avoid the necessity of recalibrating the MAF sensor, and prevents your engine from running too lean or too rich. With MR Technology, Injen created "The World's First Tuned Intake System", delivering optimum performance with a factory safe air/fuel ratio.

The SP system is carefully engineered, with CNC machined brackets and adapters, to ensure an exact fit. Installation can be accomplished with simple hand tools and everything necessary for installation is supplied, including comprehensive instructions. The SP Series Cold Air Intake System is backed by a Limited Lifetime Warranty.

Injen Technology Company, Ltd., based in Pomona, California, was formed as a sister company to RD Metal Works in 1998, to utilize the experience and design capabilities that RD Metal Works had gained designing and manufacturing air intake kits for leading air filter and intake manufacturers. Since that time, the company has made it a point to stay at the forefront of performance technology, continually setting new standards for quality and improving their engineering and manufacturing capabilities. This enables Injen to regularly introduce new, cutting edge products to market and has required the company to continually expand to meet the demand for those products. Today, Injen continues to set the industry benchmark for innovation, styling and technology.

Part Number:

Warranty Information

Find out everything you need to know about the product warranty

Injen Technology offers a 1 Year Warranty to the original purchaser against defects in material and workmanship on all intake systems excluding the filter element. Injen Technology will replace at no charge, any intake pipe considered by Injen Technology to be defective.

The warranty is void if the warranty card is not returned to Injen Technology within the first 30 days of purchase. Any and all warranty coverage is limited to the repair or replacement of the defective part only, at Injen Technology's discretion. Proof of purchase is required. The warranty does not cover incidental or consequential damages, nor does it cover the cost of installation or removal of the defective part or its replacement. All warranty items must be sent freight prepaid with a valid RMA (Return Merchandise Authorization) number and copy of original invoice.


Injen Technology reserves the right to make changes in design, material and specifications, or to make product changes as deemed necessary without prior notice. Injen Technology reserves the right to change the design of any product without assuming any obligation to modify product previously manufactured.


The Magnusson-Moss Warranty - Federal Trade Commission Improvement Act of 1975 protects consumers from such fraudulent activity by new car dealers. Under this Act, aftermarket equipment that improves performance does not void a vehicle manufacturer's original warranty, unless the warranty clearly states the addition of aftermarket equipment automatically voids your vehicle's warranty or if it can be proven that the aftermarket device is the direct cause of the failure. The easiest way to check this is to look in your owner's manual under, "what is notcovered". Under Magnusson-Moss Act a dealer must prove, not just vocalize, that aftermarket equipment caused the need for repairs before they can deny warranty coverage. If they cannot prove such claim-or offer an explanation - it is your legal right to demand compliance with the warranty. The Federal Trade Commission administers the Magnusson-Moss Act and monitors compliance with warranty law. Ct cause of the failure. The easiest way to check this is to look in your owner's - Moss Act a dealer must prove, not just vocalize, that aftermarket equipment caused the need for repairs.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is compatible with 6 vehicle(s)
Year Make Model Fitment Notes:
2013 Subaru WRX STI
  • Base 2.5L
  • This part is CARB compliant.
2012 Subaru WRX STI
  • Base 2.5L
  • This part is CARB compliant.
2011 Subaru WRX STI
  • Base 2.5L
  • This part is CARB compliant.
2010 Subaru WRX STI
  • Base 2.5L
  • This part is CARB compliant.
2009 Subaru WRX STI
  • 2.5L
  • This part is CARB compliant.
2008 Subaru WRX STI
  • 2.5L
  • This part is CARB compliant.

Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

Injen® - SP Series Air Intake System
Injen® SP1204WR - SP Series Wrinkle Red Cold Air Intake System
Average Rating: 5 of 5
5 of 5
13' WRX Injen
Great product. Quality and easy installation.
JPosted by (Oak Grove, KY) /
2013 Subaru WRX
Was this review helpful for you? Yes
5 of 5
So Worth It
Injen® SP1204WR - SP Series Wrinkle Red Cold Air Intake System
I bought the Injen sp series cold air intake in wrinkle red. Me and one of my friends installed it in my garage in about an hour (would have been easier if we knew every bolt was 10mm). After installing it worked perfect from the start, sounds tremendous when you put some gas to it, my stock blow off valve never really functioned before the intake and now it's loud and proud. You can defiantly feel the difference in power and pickup immediately. Overall great product, easy install, great results. Injen really knows how to do it.
MPosted by (Clearwater, FL) /
2009 Subaru WRX
Was this review helpful for you? Yes
5 of 5
2008 Subaru Impreza 2.5i Model
Injen® SP1204WR - SP Series Wrinkle Red Cold Air Intake System
Works great, fits right on to the 2.5i model even though it is not listed as a supported car. I of course made sure of this before purchasing it!
IPosted by (Webster, NY) /
2008 Subaru WRX
Was this review helpful for you? Yes
5 of 5
Cold Air Intake
Easy to install, sounds good.
APosted by (Spring Valley, NY) /
2008 Subaru WRX
Was this review helpful for you? Yes
5 of 5
2012 WRX
I bought the Injen SP Cold Air Intake for my 2012 WRX, and I love it. Before I bought it, my car was getting 24.9 mpg. Now after the intake is installed, I am getting between 30.3 and 33.1 mpg, depending on how hard I drive it. The power increase is noticeable right away, and the sound of the intake after 3k rpms is awesome. Only took 30 minutes to install myself.
SPosted by (Wautoma, WI) /
2008 Subaru WRX
Was this review helpful for you? Yes8  people found this review helpful.

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only.
It is neither inferred nor implied that any item sold by, is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.