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Maintenance
Oil and filter service, brakes, plugs and coils, cooling-system work, fluids and leak repairs.
BOOSTEDJUNKIE GARAGE · PEÑITAS, TX
BMW Service, Tuning & Custom Exhaust in Peñitas, TX
We work on all BMW models. From maintenance and diagnostics to tuning, custom exhaust and performance builds, we plan the work around your vehicle and your goals.
Serving Mission, McAllen, Edinburg and the Rio Grande Valley.
- Google reviews ↗
- AWD Dynojet
- Financing available
- Se habla español
Examples from the garage
From the B58 to the M cars in our archive, start with the exact BMW you drive. Our recorded M2, M3, M4 CS, M6, 540i and 550i setups show why hardware, fuel and software all belong in the same conversation.
These are examples, not a complete list of the BMW models we service. The parts listed online are only part of what we offer; ask us about your model.
- M2
- M6
- M4 CS
- 550i
- 540i
- M3
- G80 M3
- G82 M4
- G87 M2
- X3M F97
- X4M F98
Confirm compatibility and service scope with your vehicle’s year, model, engine and modifications.
The plan for your BMW
For an exhaust project, distinguish a midpipe conversion from a downpipe or a full system. Our G80/G82 and G87 midpipes have their own fitment requirements; send the current exhaust configuration before planning installation.
What we do
Diagnostics
Tell us when it happens, any fault codes and what has been changed recently.
BJG Health Checks
Pre-purchase inspections and checks before we add power.
ECU tuning
The right calibration starts with your car: its hardware, fuel, current software and how you drive it.
Custom exhaust & fabrication
Tell us how you want it to sound, what needs to fit and what the car is built to do.
AWD dyno
Ask us about baseline runs, before-and-after testing, tuning sessions or dyno rental.
Calibration and unlocking support depend on the control units and software versions. We confirm compatibility before moving forward.
Dyno-proven results
Results from complete tested configurations. Gains are shown only where a recorded baseline exists.
BJG-DYNO-0004
2024 BMW M2
Manual · Downpipes · E50 · BJG calibration
703.1 WHP
680.4 RWTQ lb-ft · Gains: +240.2 HP / +263.6 lb-ft
View setup & original chart →BJG-DYNO-0008
2014 BMW M6
FBO · BJG calibration
641.3 WHP
630.1 RWTQ lb-ft · Gains: +187.1 HP / +29.2 lb-ft
View setup & original chart →BJG-DYNO-0005
BMW M4 CS
Downpipes + intake · 93 octane · BJG calibration
597.0 WHP
581.7 WTQ lb-ft · Gains: +146.4 HP / +129.1 lb-ft
View setup & original chart →BJG-DYNO-0003
2014 BMW 550i
Downpipes · 93 octane · BJG calibration
493.3 WHP
720.7 WTQ lb-ft · Gains: +126.4 HP / +136.1 lb-ft
View setup & original chart →BJG-DYNO-0002
2017 BMW 540i
FBO · E40 · OTS calibration
436.8 WHP
481.5 WTQ lb-ft · Gains: +93.8 HP / +83.5 lb-ft
View setup & original chart →BJG-DYNO-0006
2015 BMW M3
Bolt-ons · 93 octane · BJG calibration
436.7 WHP
477.8 RWTQ lb-ft · Gains: +54.4 HP / +74.9 lb-ft
View setup & original chart →Parts for this platform
BJG Custom 3.5in Midpipe w/ Bracket for G80/82 M3/M4
Sold out · Made to order. Lead times vary: typically 6–8 weeks; some orders may be ready in 1–2 weeks. Contact us to confirm availability and timing for your part.
Ask about a made-to-order partCheck the year, generation and part fitment with us before planning installation.
BJG Custom Charge-Pipe Kit: BMW B58 Gen 1 - Cerakote Black
Sold out · Made to order. Lead times vary: typically 6–8 weeks; some orders may be ready in 1–2 weeks. Contact us to confirm availability and timing for your part.
Ask about a made-to-order partCheck the year, generation and part fitment with us before planning installation.
BJG Custom Race Downpipe: BMW B58 - Stainless Steel
Sold out · Made to order. Lead times vary: typically 6–8 weeks; some orders may be ready in 1–2 weeks. Contact us to confirm availability and timing for your part.
Ask about a made-to-order partCheck the year, generation and part fitment with us before planning installation.
BJG Custom Single Midpipe w/ Bracket for BMW G87 M2 - Stainless Steel
Sold out · Made to order. Lead times vary: typically 6–8 weeks; some orders may be ready in 1–2 weeks. Contact us to confirm availability and timing for your part.
Ask about a made-to-order partCheck the year, generation and part fitment with us before planning installation.
BJG Race Downpipes: BMW X3M/X4M F97/F98 - Stainless Steel
Sold out · Made to order. Lead times vary: typically 6–8 weeks; some orders may be ready in 1–2 weeks. Contact us to confirm availability and timing for your part.
Ask about a made-to-order partCheck the year, generation and part fitment with us before planning installation.
Before your visit
What details do you need about my BMW?
Send the year, model, engine, mileage, modifications, fuel and what you want to solve or build.
Can you check the car before adding power?
Yes. Book a BJG Health Check so we can look over your car before planning loaded dyno runs.
Does every result include a measured gain?
We only show a gain when we measured the car before and after. If we only have a final run, we show that result on its own.
How do I confirm service or installation?
Tell us what you drive and what you want done. We’ll check what fits, talk through the work and confirm an available appointment.
Where is the garage?
1325 Expressway 83, Peñitas, TX 78576. Monday–Friday, 9:00 AM–6:00 PM.