At our Randburg workshop, we don’t just modify — we engineer. 🔧🔥
Whether you drive a BMW, Ford, Mercedes-Benz, Chevrolet, Audi, Toyota, Nissan, or any other brand, our mission is the same:
Deliver precision, power, and purpose-built results backed by true engineering excellence.
Why J7 Performance Is the Leader in Automotive Engineering Upgrades
1. Custom Exhaust Systems (Built for Flow, Sound & Power)
Every exhaust system we build is hand-fabricated, using performance-grade stainless steel, TIG welding, and engineered flow paths.
Benefits include:
Increased horsepower and torque
- Sharper throttle response
- Aggressive but refined exhaust tone
- Improved performance across the RPM range
- We design exhausts for:
BMW, Ford, Toyota, Mercedes-AMG, Audi, Nissan, Chevrolet and many more.
2. Precision ECU Tuning (Dyno-Backed, Custom Calibrated)
Your engine deserves software that matches your hardware.
At J7 Performance, every tune is:
Custom-mapped for your exact vehicle
- Dyno tested for proven gains
- Built for drivability, safety and power
- Tailored for naturally aspirated, turbocharged and supercharged setups
- No generic maps. No shortcuts. Real engineering.
3. Motorsport-Level Fabrication & Performance Upgrades
From mild to wild — we fabricate and install upgrades that meet motorsport standards:
Performance intake fabrication
- Stainless steel and aluminium custom piping
- Roll bars and chassis bracing
- Intercooler systems
- Supercharger installations
- Transmission and drivetrain enhancements
- If it requires precision cutting, welding, machining or custom engineering — we build it in-house.
Vehicles We Specialize In
J7 Performance works on some of South Africa’s most popular and performance-focused brands:
BMW – M Performance tuning, custom exhausts, dAHLer upgrades
Ford – Mustang upgrades, Ranger tuning, Whipple supercharger installs
Mercedes-Benz – AMG performance exhausts, ECU/TCU tuning
Chevrolet – Lumina SS custom fabrication & power builds
Audi – S/RS custom tuning, Stage 1–3 upgrades
Toyota – Hilux, Land Cruiser, and GR performance enhancements
Nissan – Navara, 350Z/370Z, and GTR upgrades
And many more — if it has wheels and an engine, we engineer it.
Why Engineering Matters More Than Guesswork
Too many workshops rely on trial-and-error tuning and copy-paste software.
At J7 Performance, everything is built on:
Engineering principles
- Calculated flow dynamics
- Precision data logging
- Dyno-proven testing
- Premium parts and expert craftsmanship
- Your build deserves more than guesswork.
It deserves engineering you can feel every time you drive.
Visit J7 Performance in Randburg