2021 Subaru WRX STI Intake Upgrade Parts
19 parts listed for your 2021 Subaru WRX STI for a complete intake upgrade. Choose your trim on product pages to confirm exact fit. This is an easy DIY project - estimated 30-60 minutes.
Cold Air Intakes
(9)primary
AEM Induction
Part # 21-863C
AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System
$299.99
AEM Induction
Part # 21-863WR
AEM Induction 2019 Subaru WRX STI 2.5L Cold Air Intake - Wrinkle Red
$419.99
aFe
Part # 56-70014R
aFe Takeda Momentum Pro 5R Cold Air Intake System Subaru WRX STI 18-19 H4-2.5L
$410.00
aFe
Part # 56-70014D
aFe Takeda Momentum Pro Dry S Cold Air Intake System 18-19 Subaru WRX STI H4-2.5L
$420.00
Injen
Part # SP1208P
Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished
$313.74
Injen
Part # SP1208WB
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black
$313.74
Injen
Part # SP1208WR
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red
$313.74
K&N
Part # 69-8009TWR
K&N 2018 Subaru WRX STI H4-2.5L F/I Typhoon Performance Intake
$367.99
Performance Air Filters
(10)primary
AEM Induction
Part # 28-50092
AEM 19-20 Subaru WRX STI 2.5L DryFlow Air Filter
- Type
- Engine
$70.47
Standard Motor Products
Part # AV69
AIR CLEANER CHECK VALVE
- Type
- Engine
$284.62
Beck Arnley
Part # 042-1981
AIR FILTER
- Type
- Engine
$22.42
Beck Arnley
Part # 042-2174
CABIN AIR FILTER
- Type
- Engine
$23.43
Pronto
Part # PA99861
Engine Air Filter
- Type
- Engine
$11.65
K&N
Part # VF2055
K&N 09-18 Subaru Forester 2.5L H4 F/I Cabin Air Filter
- Type
- Engine
$55.47
K&N
Part # 33-5092
K&N 2019 Subaru WRX STI 2.5L F/I Replacement Air Filter
- Type
- Engine
$70.47
Baldwin Filters
Part # PA4197
Panel Air Element
- Type
- Engine
- Style
- Panel
$13.40
Intake Upgrade for Other Subaru WRX STI Years
Other Jobs for Your 2021 Subaru WRX STI
Frequently Asked Questions
What parts do I need for a intake upgrade on my 2021 Subaru WRX STI?
A complete intake upgrade on the 2021 Subaru WRX STI typically requires cold air intakes, performance air filters. This page groups parts commonly associated with that year, make, and model; confirm your trim on product pages for exact fit.
How long does a intake upgrade take on a 2021 Subaru WRX STI?
A intake upgrade typically takes 30-60 minutes and is rated as easy difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a intake upgrade myself?
Yes! A intake upgrade is an easy DIY project that most people can do with basic hand tools. It's a great way to save money on labor costs.
Are these parts guaranteed to fit my 2021 Subaru WRX STI?
These parts are listed for the 2021 Subaru WRX STI using manufacturer fitment data. Some products fit every trim, while others require trim confirmation. Use your trim in My Garage or the product page fitment checker to confirm exact fit.
What brands make intake upgrade parts for the 2021 Subaru WRX STI?
We carry intake upgrade parts from trusted brands including AEM Induction, aFe, Injen, K&N, and Standard Motor Products. Filter by brand to find your preferred manufacturer.
How much does a intake upgrade cost for a 2021 Subaru WRX STI?
The cost of a intake upgrade for the 2021 Subaru WRX STI depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.