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Subaru Performance shop with Dyno Tuning by TheBoostCreep LTD. We offer parts, installation, and tuning all in one location.
Performance Specialty Shop for Subaru, Mitsubishi, Porsche, and Nissan offering turbo upgrades, fuel system support, standalone engine management, dyno tuning, and engine upgrades. We're a Certified Engine Installer for IAG Performance, and we carry parts from Cobb Tuning, IAG Performance, Extreme Turbo Systems, Radium Engineering, Injector Dynamics, Haltech ECU, AEM Electronics, AEM Intakes, and more.
Sam’s car got a new engine and turbo a little while back, and we just updated to the fuel system with a radiumengineering fuel pump hanger and bigger fuel pump. This car spools so early and makes great power, while still passing emissions testing. It’s the perfect street car!
02/02/2026
We have this Hill Country Garrett G30-770 in stock right now! This is a stock location turbo for EJ Subarus. We haven’t tried this turbo yet but we have high hopes. Hit us up if you want to be the first to find out what it’s capable of, it’s priced at $1550 and we can install it and tune in house at TheBoostCreep Ltd.
01/29/2026
We are now a Valvetronic dealer! Hit us up for these awesome exhausts
11/12/2025
Finally! Cobb has the best solutions!
10/28/2025
Another difficult built car needed emissions help. This is not some weird emissions tune result. This is perfect tuning, proper emissions equipment installed, some custom help in the form of thermal management, as well as some very cool new spark plug technology. These projects are difficult but I love a good challenge.
I am here to help keep your car on the road and keep the exhaust nice and clean!
On Henry’s 22 WRX, we just installed the IAG/Nostrum High Pressure Fuel Pump and an STi six speed transmission. The FA24 is a beast on E85 with the stock turbo!
06/28/2025
This 22 WRX just got some lAG Performance fuel injectors and is tuned by TheBoostCreep Ltd. on 60% ethanol with a COBB Tuning Accessport!
Look at all that torque! Soon we'll be adding the high pressure fuel pump and Cobb Flex Fuel.
This 2007 STi just got a new Turbo Dynamics MDX555-400, along with a Grimmspeed uppipe, Perrin turbo inlet, ID1050xds fuel injectors, and an E85 tune by TheBoostCreep Ltd. It made 394 wheel horsepower but we turned it down just a little bit before sending it on its way. This setup is so responsive and fun! Injector Dynamics injectordynamics turbodynamics
02/15/2025
Yay Flex Fuel! Hit us up if you’re ready!
COBB Flex Fuel for Subaru VB WRX is HERE! VB WRX Flex Fuel is here! COBB CAN Flex Fuel coupled with Accessport tuning is the easiest way to add over 50HP and 80TQ to your Subaru WRX!
02/14/2025
Now that’s clean!
Today we got this Legacy GT Spec B to pass emissions after previously failing the test. We have always encouraged our customers to keep their cars emissions compliant, and this one passed well below the allowable limits.
For Erica’s 2106 GTI, we installed an IS38 turbo along with exhaust and intake, then TheBoostCreep Ltd. tuned it on pump gas only. This car is so much fun! Now it just needs Cobb Flex Fuel to really scoot. COBB Tuning
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Address
245 3rd Avenue
Longmont, CO
80501
Opening Hours
| Monday | 10am - 6pm |
| Tuesday | 10am - 6pm |
| Wednesday | 10am - 6pm |
| Thursday | 10am - 6pm |
| Friday | 10am - 6pm |