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GrimmSpeed StealthBox Cold Air Intake Red 2015-2021 STI

SKU 060078
Save $34.90 Save $34.90
Original price $349.00
Original price $349.00 - Original price $349.00
Original price $349.00
Current price $314.10
$314.10 - $314.10
Current price $314.10

You've been asking for this bad sally for a while and it's finally here. The intake the for the 15+ STI can be thought of as a hybrid of the tube and filter used in the 08-14 WRX intake and the Stealthbox heat shield used in the 2015+ WRX intake. Small design changes were made, but the overall fit and performance is approximately the same.


  • Hybrid Cold Air/Short Ram Design - Combining the advantages and eliminating the negatives of both traditional intake designs
  • Air straightener - Dimensionally mimics the factory configuration for accurate MAF sensor readings
  • MAF sensor location - Inside heat shield, isolated from engine bay heat
  • Custom reusable high flow air filter - Integrated velocity stack entrance smooths incoming air
  • StealthBox Heat Shield - Sleek, unique design looks KILLER in your engine bay and keeps the heat of the engine bay from affecting performance
  • Made in the USA
  • 30min Installation - Extremely simple with our written and video guides

Sometimes, this explanation is long and technical, especially where performance is concerned. This time, it's simple. The GrimmSpeed engineering and manufacturing teams are known for designing and producing products that use high quality materials, offer perfect fitment and superior craftsmanship and are durable. These intakes are no different and feature the proven performance of the 08-14 WRX EJ motor intake (third party results coming soon) with a look and feel that set it apart from the competition. With the Stealthbox intake heat shield, you no longer need to look like you've got a shoe box hanging out where your factory airbox used to be.

Of course, like all GrimmSpeed products, we stand behind these kits 100% and our goal is to offer you a customer experience that makes you want to stand behind them as well.

Customer Reviews

Based on 5 reviews
James Vazquez
Grimmspeed stealth box

Easy to install sounds great give the Sti that I’ll breath it needs.. I Love It


Thank you for your 5 Star Review of the GrimmSpeed StealthBox Cold Air Intake for your STI!



💯 legit


Thank you for taking the time to leave a 5 Star Review and added pic of the GrimmSpeed StealthBox Cold Air Intake!


Perfect fit

Fits great with the grimspeed FMIC. I like the clean look it gives the engine bay.


We appreciate your 5 Star Review and added pic! The GrimmSpeed StealthBox Cold Air Intake is a perfect addition to your STI and the GrimmSpeed FMIC! All the extra breathability and cooler air are perfect for added HP!


Joshua Barrett
Stealth airbox

Very easy install. Was looking for something to pull cooler air away from the engine bay, this was the perfect solution. With my grimmspeed FMIC, intake temps are staying 5-10 degrees from ambient in the southern heat


We appreciate the 5 Star Review! The GrimmSpeed StealthBox Cold Air Intake is a the perfect way to pull cooler air in just as you are looking for! Cooler air to your engine means more performance and bigger HP!


Marshall Cook
Great product. Well built

Love this intake! Well constructed and who needs to listen to the stereo after this mod?! the sound is amazing


You definitely don't need to turn the radio on when you have the GrimmSpeed StealthBox Cold Air Intake! It sounds amazing and provides better throttle response, more horsepower, and better torque! Thank you for the 5 Star Review!


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