Expert Subaru
Repair, Tuning & Performance
No Hype. Just Horsepower.
Southern Oregon's Precision Tuning and Subaru Performance Shop — Jacksonville, OR
Built for the PNW Subaru Community
Our Expertise
Rooted in Southern Oregon and built for the Pacific Northwest, EJ Mafia combines over two decades of Subaru performance expertise. From ECU tuning and power upgrades to complete engine builds, we deliver precision, reliability, and serious results for every road and rally.
The Team
Led by Bandy Tuned and Jayson Marks, the EJ Mafia Pro Tune Team represents the heart of the PNW Subaru community. With 20+ years of hands-on experience, we build faster, stronger, and smarter Subarus.
What We Build
Subaru-specific expertise from bolt-ons to full engine builds. We know the boxer inside and out.
ECU Pro Tuning
Custom ECU calibration developed through real-world street tuning and data logging. Every map is built around your specific setup — no cookie-cutter tunes.
Starting at $500
- Custom fuel & timing maps
- Boost control optimization
- Data logging & analysis
- Street & track profiles
Engine Builds
Complete EJ & FA engine builds with forged internals, upgraded turbo systems, and race-proven reliability.
Starting at $3,500
- Forged pistons & rods
- Built short blocks
- Head porting & polishing
- Turbo upgrades & swaps
Performance Upgrades
Bolt-on and fabricated upgrades to unlock serious power — intake, exhaust, intercooler, and fuel system work.
Starting at $250
- Turbo-back exhaust
- Intake & intercooler
- Fuel system upgrades
- Boost control systems
Subaru Repair & Maintenance
Factory-level diagnostics and repair by specialists who know Subarus inside and out. Head gaskets, timing belts, and beyond.
Starting at $150
- Head gasket repair
- Timing belt service
- Clutch replacement
- Diagnostic & troubleshooting
Street Tuning
Real-world street tuning with full data logging for baseline testing, tune verification, and before/after driveability comparisons.
Starting at $200
- Baseline logging
- Tune verification
- Before/after comparisons
- Air/fuel ratio logging
Custom Fabrication
One-off fab work for intercooler piping, exhaust routing, turbo manifolds, and custom brackets.
Starting at $300
- Intercooler piping
- Custom exhaust
- Turbo manifolds
- Weld & bracket work
No Hype.
Just Horsepower.
At EJ Mafia, every tune is built around your goals, your setup, and your car's true capability. No cookie-cutter maps. No ego-driven tuning. Just real, measurable results that thrill you every time you drive. You don't leave disappointed — you leave impressed.
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Years Experience
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Max WHP Tuned
From Consultation to Full Send
Our proven 8-step build process ensures reliable power and peace of mind on every project
Consultation
We talk through your goals, budget, and timeline. No pressure — just straight talk about what your Subaru needs.
Inspection & Diagnosis
Full vehicle inspection with diagnostic scans. We find what the other shops missed.
Parts Sourcing
We source the right parts from trusted suppliers — no cheap knock-offs, only proven components.
Teardown & Prep
Controlled disassembly with documentation. Every bolt is tracked, every surface prepped.
Build & Assembly
Precision assembly with factory-spec torque values and meticulous attention to detail.
Street Tuning
Custom ECU calibration developed on the road — dialed in for your exact setup with real-time data logging.
QC & Road Test
Comprehensive quality check and road test under real-world conditions. Nothing leaves until it's right.
Delivery & Walkthrough
Full walkthrough of everything we did, with tune logs and maintenance recommendations.
Shop Scene
From engine stand to tune log — see the quality that goes into every build
Forged EJ257 Short Block
Forged internals, balanced and blueprinted for 500+ whp reliability.
Pro Tune Session
Custom ECU calibration with real-time data logging and verification.
Full Build & Tune
From stock to 400+ whp — engine, turbo, and tune all done in-house.
The EJ Mafia Garage
Where the magic happens. Real tools, real builds, real results.
What the Community Says
Real builds, real results — hear from Subaru owners who trust EJ Mafia
"Bandy and the crew built my EJ257 from the ground up. Forged internals, rotated turbo setup, and a tune that makes 420whp on pump gas. The car is an absolute weapon and hasn't missed a beat in 15k miles."
Tyler R.
2006 WRX STI
"Got a pro tune after installing my bolt-ons. The difference is night and day — throttle response is crisp, boost comes on smooth, and I picked up 45whp. These guys actually know what they're doing."
Marcus K.
2015 WRX
"Took my Forester in for head gaskets after the dealer wanted $4k. EJ Mafia did it for way less, used better gaskets, and the car runs cooler than it ever has. Honest shop with real expertise."
Sarah L.
2019 Forester XT
Frequently Asked Questions
Southern Oregon's Precision Tuning and Subaru Performance Shop
Shop Hours
EJ Mafia, LLC • 7200 Oregon 238, Jacksonville, OR
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