ABOUT RAMJET
Built, Not Hyped. Engineered to Win.
Ramjet Performance isn’t just another exhaust brand.
We’re the product of decades of real-world motorsport, dyno testing, and relentless R&D built inside one of Australia’s most respected high-performance workshops: GM Motorsport, Melbourne.
Every system we release is designed with one goal:
Make more power. Sound better. Last longer.
No gimmicks. No shortcuts.
WHERE IT STARTED
Ramjet was born on the workshop floor not in a boardroom.
At GM Motorsport, we’ve spent over 15 years pushing LS platforms to their limits. From street builds to world championship race boats, we’ve seen firsthand what works… and what doesn’t.
Led by Phonsy Mullan one of Australia’s most experienced LS tuners and a 2x UIM World Champion, every product is shaped by real performance demands, not marketing trends.
If it doesn’t perform on the dyno, on the street, and under load…
It doesn’t get the Ramjet name.
ENGINEERED DIFFERENT
Most exhaust brands copy what already exists.
We don’t.
Every Ramjet system is designed, tested, and developed in-house in Melbourne, using advanced manufacturing and real performance data.
What sets us apart:
-
Triple Step Header Technology
Stepped from 1 3/4” → 1 7/8” → 2” to maximise velocity AND top-end flow
→ More torque down low
→ More power up top -
Equal Length Primary Design
Balanced exhaust pulses = better scavenging, smoother flow, cleaner sound -
True Internal X-Pipe Systems
Not just for noise engineered to improve flow and eliminate drone -
Premium 304 Stainless Steel Construction
Built to handle heat, abuse, and time -
Dyno-Proven Performance Gains
Every system is tested not guessed
This is not “off-the-shelf” thinking.
This is engineered performance.
TESTED IN THE REAL WORLD
We don’t rely on theory.
We validate everything through:
- In-house dyno testing
- Street-driven builds
- High-performance applications
- Motorsport environments
From Holden LS platforms to Ram 1500s and Mustang GTs our systems are proven where it matters.
Not just numbers.
Results you can feel.
THE STANDARD WE BUILD TO
We don’t build for average.
We build for people who care about:
- Real performance gains
- A deep, aggressive, refined exhaust note
- Perfect fitment
- Long-term reliability
That’s why every Ramjet system is backed by a 5 year warranty.
Because if it’s got our name on it…
It has to hold up.
OUR MISSION
To build the most engineered bolt-on exhaust systems in the world.
Not the loudest.
Not the cheapest.
The best performing. The best sounding. The most refined.
FOR THOSE WHO KNOW
Ramjet isn’t for everyone.
It’s for the guys who understand the difference between:
- Noise vs tone
- Parts vs engineering
- Marketing vs results
If that’s you…
You’re in the right place.
JOIN THE NEXT LEVEL
Upgrade your system.
Transform your car.
Feel the difference every time you hit the throttle.
Ramjet Performance
Built, not hyped.