Modified Subaru WRX STI with aftermarket wing on a mountain overlook in the NorCal foothills
COBB Certified Ecutek Certified EFI University Mustang Dyno

Build.
Tune.
Dominate.

Serious Subaru performance from two COBB Certified Protuners with 20+ years combined tuning experience, an in-house Mustang Dynamometer MD-AWD-150, and a fully equipped machine shop that doesn't outsource anything.

(530) 823-7645
2 COBB Certified
Protuners
20+ Years Combined
Tuning Experience
MD-AWD Mustang Dynamometer
150 In-House
EFI EFI University
Graduates
100% In-House
Machine Shop
ECU Tuning

Real Tuning.
Not Cookie-Cutter Maps.

Every Subaru is different. We tune yours on the dyno with your mods, your fuel, and your goals — not a generic "stage 1" off the shelf.

COBB Accessport Tuning

Certified COBB Protuner on-site. Full Accessport flashing, custom map development, dyno-pull verification, and in-person tune sessions. We write the map from scratch for your exact setup.

Custom Accessport maps for your specific mods Street, track, and E85 tunes available Dyno-confirmed power numbers every time Rev-matching, AVCS, and fueling optimization

Mustang Dyno MD-AWD-150

Our in-house all-wheel-drive Mustang Dynamometer gives us real, repeatable power numbers and live data during tune sessions. No guessing — just accurate baseline-to-baseline comparisons showing exactly what your modifications are worth.

Up to 1,500 WHP capacity AWD testing Air/fuel ratio, knock, boost logging Before & after dyno sheets provided Available for standalone dyno sessions

EFI University Trained

Our tuners are EFI University graduates — the industry's premier engine management and tuning education program. This means deep understanding of combustion science, not just button-pushing with software.

Formal combustion and fueling theory training Safe tune methodology — power without grenading engines Platform-agnostic understanding of engine management
M45 Automotive technician machining a Subaru engine block in the in-house machine shop
Engine Builds

In-House.
No Outsourcing.
No Excuses.

We have a fully equipped machine shop on-site. Every block, head, and rotating assembly gets worked on here — not shipped out to a third party. Tighter tolerances, faster turnaround, and we stand behind every build.

Stage Builds EJ and FA-series stage 1, 2, and 3 long-block and short-block packages. Matched to your power goals and fuel octane.
Closed Deck Blocks Closed deck conversion for EJ25 and EJ20 blocks. Significantly increased rigidity under high boost — essential for serious power goals.
Sleeved Blocks Cylinder sleeving for high-boost builds requiring larger bore or severely worn cylinders. Done in-house on our boring and honing equipment.
Head Work Resurfacing, porting & polishing, valve jobs, and cam upgrades. Stock replacement through full race prep.
Rotating Assembly Balanced and blueprinted builds using forged pistons, rods, and upgraded bearings. We spec the right parts for your target power.
Bolt-Ons & Beyond

Everything Your Subaru Needs
to Go Faster

From springs and sway bars to full turbo kits — we source, install, and tune it all.

Handling

Suspension

Stopping Power

Brakes

Forced Induction

Turbo

  • Turbo upgrades & replacements
  • Intercooler (TMIC / FMIC)*
  • Boost controller installation
  • Boost control system upgrades*
  • Blow-off & bypass valves*
  • Inlet pipe & coupler kits

Breathing

Intake & Exhaust

  • CARB-approved cold air intakes
  • Performance air boxes & filters
  • Cat-back exhaust systems
  • Axle-back exhaust systems
  • CARB-approved catalytic converters
  • Custom exhaust fabrication

Fueling

Fuel System

  • Fuel pump upgrades
  • High-flow injectors*
  • Fuel pressure regulator*
  • CARB-approved flex fuel kits
  • Fuel rail upgrades*
  • Fuel line & fitting upgrades

Drivetrain

Clutch & Trans

  • Performance clutch kits
  • Lightweight flywheels
  • Transmission fluid service
  • Shifter bushings & short throws
  • Rear differential upgrades
  • Driveshaft service

* Some performance modifications may be for off-road or racing use only. We install CARB-compliant components for street-driven vehicles.

Let's Build Something

Ready to Make Your
Subaru a Weapon?

Whether you want a reliable daily driver with a bit more pull, a full race build, or anything in between — start with a consult. We'll tell you exactly what's possible and what it'll take to get there.

Call (530) 823-7645

Mon–Fri 8:00am–5:00pm  ·  Auburn, CA