Shop By Vehicle

STI '15-'21 Upgrades

9 Results

Engine Dress-up Clips for 15-21' WRX/STI (25 pc Complete Kit)
Engine Dress-up Clips for 15-21' WRX/STI (25 pc Complete Kit)

Engine Dress-up Clips for 15-21' WRX/STI (25 pc Complete Kit)

$110.00

Unit price
per 

3 color optionss
  • Anodized Blue
  • Anodized Black
  • Anodized Red
Paragon Accessport Vent Mount - 15-21' WRX/STi and 14-18' SJ
Paragon Accessport Vent Mount - 15-21' WRX/STi and 14-18' SJ
Sale
Multiple Applications

Paragon Accessport Vent Mount - 15-21' WRX/STi and 14-18' SJ

Regular price from $119.00

Unit price
per 

3 colors
  • Anodized Black
  • Anodized Red
  • Anodized Silver
Airblades 2.0
Airblades 2.0

Airblades 2.0 Radiator Shrouds 2015-2021 WRX / 2014-2018 Forester

$199.00

Unit price
per 

5 color optionss
  • Neon Yellow
  • Wrinkle Red
  • Wrinkle Black
  • White Hot
  • Silver
STI Louvre Cover - 08' + STI
STI Louvre Cover - 08' + STI

STI Louvre Cover for 2008-2010 STI, 2011-2014 STI, 2015-2021 STI

$225.00

Unit price
per 

5 color optionss
  • Wrinkle Red
  • Wrinkle Black
  • White Hot
  • Silver
  • Neon Yellow
STI Fender Vent
STI Fender Vent
Compressive Tuning Original M6 Dress-Up Bolts 10pc-kit
Compressive Tuning Original M6 Dress-Up Bolts 10pc-kit

Compressive Tuning Original M6 Dress-Up Bolts 10pc-kit

$49.00

Unit price
per 

3 colors
  • Anodized Red
  • Anodized Black
  • Anodized Blue
SmartFlow Shroud
SmartFlow Shroud
Best Seller

SmartFlow Radiator Shroud for 2015-2021 WRX/STI

$285.00

Unit price
per 

5 color optionss
  • White Hot
  • Neon Yellow
  • Wrinkle Red
  • Wrinkle Black
  • Anodized Silver
AirShields - STI, Ascent, Outback, Legacy, WRX (VB)
AirShields - STI, Ascent, Outback, Legacy, WRX (VB)
Best Seller

AirShields - STI, Ascent, Outback, Legacy, WRX (VB)

$135.00

Unit price
per 

3 color optionss
  • Wrinkle Red
  • Wrinkle Black
  • Anodized Silver
Engine Dress-up Clips
Engine Dress-up Clips

Engine Dress-up Clips fits most Subaru Models

from $25.00

Unit price
per 

2 clip sets

Enhance Your 2015-2021 Subaru WRX STI with Performance Parts and Upgrades

Designed specifically for the 2015-2021 Subaru WRX STI, this collection offers a comprehensive range of premium parts to improve power, handling, and style. Whether you’re aiming to sharpen your vehicle’s response or upgrade its appearance, these components provide reliable, tailored solutions for your STI platform.

What are the key performance upgrades for the 2015-2021 WRX STI?

Upgrading your WRX STI can target several areas including the exhaust, suspension, engine management, and drivetrain. Performance exhausts enhance flow and sound, suspension components improve handling and stability, while engine management tools optimize power delivery. Drivetrain upgrades ensure your STI can handle increased power with better engagement and durability.

  • Performance exhaust systems for improved flow and aggressive tone
  • Adjustable coilovers and sway bars to refine handling and stance
  • Engine management solutions for precise tuning and monitoring
  • Clutches and short shifters to enhance driving feel and reliability

How to choose the right parts for your WRX STI upgrades?

Selecting the right upgrades depends on your driving goals, whether daily driving, spirited street use, or track performance. Consider compatibility with your STI’s EJ25 engine and drivetrain, as well as how each part complements others in your build. Prioritize components that balance performance gains with reliability and fitment for the 2015-2021 model years.

Where to find trusted parts and upgrades for your Subaru WRX STI?

At Compressive Tuning, we specialize in Subaru-focused aftermarket and OEM replacement parts designed for the 2015-2021 WRX STI. Our collection covers everything from performance exhausts and suspension to engine management and drivetrain upgrades. Explore our selection to find quality components that elevate your STI’s performance and style.

Shop By Vehicle