Aftermarket Modification Services in Colorado Springs, CO

$120 Full Inspection

Walk-Ins Welcome

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Optimize Your Vehicle's Capability with Aftermarket Modifications at TGA Performance

Got a Subaru and want to make it truly yours? At TGA Performance in Colorado Springs, majority of the cars we modify are Subarus. We offer a range of aftermarket mods and the performance engine builds that’ll make your ride stand out.


Some of our most popular mods include: 


  • Custom ECU tuning for optimized performance
  • Turbo and supercharging improvements for extra power
  • Fuel system upgrades, including flex fuel support
  • Custom airbag and performance suspension tuning and installation
  • Performance wheel and tire packages


Ready to take your car to the next level? Let our team of experienced technicians install your next mods in a professional and timely manner. Contact us today to get started.



Subaru Stages Modification Guide

At TGA, we're here to help you make informed decisions about modifying your vehicle. With so many useless parts on the market, our guides are based on our extensive experience and are meant to serve as a solid foundation for ongoing mods. This isn't an exhaustive list, but rather a great starting point.


First and foremost, always do your research when modifying your car from OEM specifications. Plan ahead for your vehicle's future, consult with your installer before purchasing parts, and be aware that most aftermarket parts may not be compatible with other brands. Here are some of our recommended mods for various stages; feel free to suggest additions as this list is meant to evolve. For anything beyond Stage 2, consider having a backup mode of transportation. A highly modified Subaru requires constant monitoring, much like any race car.


View Guide

Benefits of Choosing TGA Performance

When it comes to aftermarket mods, TGA Performance stands out for a reason. 


Here’s what sets us apart:


  • Custom vehicle mods tailored to your needs
  • Walk-ins always welcome
  • $120 full inspection to keep your car in top shape
  • 6 service bays for fast, efficient service
  • Master-level technician on-site
  • Cutting edge technology and tools
  • Certified installer for top brands like COBB and EcuTek
  • Veteran-owned business
  • Decades of experience


Don’t wait any longer to upgrade your performance. Reach out to TGA Performance and let’s make your car the best it can be.



Contact Us

If you’re ready to experience the best in aftermarket mods, TGA Performance is here for you. Our expert team is always ready to help you achieve your performance dreams. Call us today and let’s get started on your project.

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A blue car is parked in front of a performance store

View our Subaru Stages Modification Guide below:

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View our engine build pricing below:

Stage 1

Tuner, intake, catback, mild suspension

TGA recommendations:


  • Cobb Accessport
  • Cat-back exhaust
  • Short shifter/shifter bushings
  • Steering rack bushings
  • Subframe lock down bolts (02-07)
  • Anti-lift kit
  • Wheel/tire upgrades for summer/winter use
  • Exterior accessories
  • A habit of checking your oil levels at every gas tank!

Stage 2 (270-350hp)

Stage 1 + turbo back exhaust, adjustable suspension, cooling system, oil system

TGA recommendations:


  • Downpipe
  • Sway bars and endlinks
  • Subframe bushings (08+)
  • Stage 2 off the shelf map
  • Air/Oil seperator
  • Heat shielding (downpipe/turbo)
  • High quality oil
  • Spring/ Strut upgrades
  • Brake pad/rotor/fluid upgrades
  • High Performance driving lessons
  • A helmet for track use (SA2010+)
  • Driving apparel (shoes/ gloves)
  • Spark plug upgrade

Stage 2+ (350- 450hp)

Stage 2 + E85, turbo, fuel pump, injectors, clutch, pistons, EWG

TGA recommendations:


  • GET A DAILY DRIVER!
  • E85 conversion (fuel pump, injectors, tune)
  • Clutch upgrade
  • Forged pistons
  • External wastegate
  • Headers
  • Aggressive suspension (fully adjustable suspension)
  • Racing brake pads, rotors
  • Track use only tires/wheels
  • Safety equipment (cage, racing seat belts, etc...)
  • Aluminum radiator
  • Electronic boost controller
  • Top mount or front mount intercooler upgrade
  • Weight reduction
  • Gauge monitoring (AFR, oil PSI/temp, boost)

Stage 3 or higher (450hp+)

Stage 2 + larger turbo, drive train, suspension

TGA recommendations:


  • Engine rods, pistons, camshafts, valves
  • Blueprinted custom engine
  • Bore Sleeves
  • Larger turbo 25psi+
  • Coilover suspension
  • Race spec cage/ safety gear
  • Aero additions
  • Engine/drivetrain mounts
  • Racing school
  • Tow rig/ trailer