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High Performance Holden & HSV late model workshop and tuning centre, Manufacturer of Ramjet, Ripshift and a range of High Performance Camshafts for LS engines.

24/06/2026

The proven combination delivers again. 🔥

Our Stealth Camshaft + CNC Head package continues to produce outstanding results on the dyno.

⏳ EOFY Sale Ends Soon — secure your spot today with just a $250 deposit and lock in your head & cam upgrade before the sale ends.

👉 Get your online quote here: https://gm-motorsport.com/

15/06/2026

EOFY Sale at GMMotorsport!

Secure your Head & Cam Package with just a $250 deposit and choose a booking date that suits you. 💪🏽

Now is the perfect time to give your car the power, performance and chop it deserves. 🔥

Limited spots available, so get in quick! 👊🏻

https://gm-motorsport.com

Another Full Exhaust, Intake & Tune package delivered!Brett came in for a set of Ramjet Triple Step Headers & Cats, an X...
12/06/2026

Another Full Exhaust, Intake & Tune package delivered!

Brett came in for a set of Ramjet Triple Step Headers & Cats, an Xforce exhaust system, and a Ramjet 3 OTR.

Unfortunately, we were out of stock of the Triple Steps on the day, so we fitted a set of our 1 3/4” Headers & Cats instead. They’re a perfect match for a standard internal engine combination and still deliver excellent performance.

The result? Strong gains across the board and another happy customer with a Full Exhaust, Intake & Tune package that made great power on the dyno. 💪🔥

29/05/2026

LUMPY FRIDAYS 🔥

The Stealth Camshaft continues to be one of GMMotorsport's most popular cam packages. It's called the Stealth Camshaft, although there's absolutely nothing stealthy about the idle. 😂

Delivering the perfect balance of power, drivability, and that tough cammed note everyone loves, it's the ideal setup for those wanting serious performance while retaining the factory stall converter.

This VF is equipped with:

✅ Ramjet 1 3/4" Headers & Cats
✅ Ramjet 3 OTR Intake
✅ GMM Stealth Camshaft
✅ GMM V3.5 CNC Cylinder Heads
✅ GMM CNC Intake Manifold

The result? Serious power, a tough note, and a combination that's hard to beat on the street.

Would you run a Stealth Cam in your Holden? 👇

28/05/2026

We continue to smash out more Ram 1500 Full Exhaust & Tune packages! 🔥

The Ramjet Performance Full Exhaust System continues to deliver incredible results time and time again with massive torque gains, better response and an aggressive sound to match.

If you want your Ram 1500 to stand out from the rest and compete with the top trucks on the road, send us a message or give us a call today!

27/05/2026

The customer wanted maximum effort horsepower while keeping the standard stall converter!

We removed the MAF, added a CNC ported intake manifold and CNC heads, then paired it all with our famous Stealth Camshaft.

The results may shock you… and yes, the tyres definitely helped it chase down the 350rwkw target 😅

26/05/2026

What’s the real difference between CNC Heads and standard heads? 👀

In today’s video we put it to the test. Same setup we always run:

Stealth Cam
Ramjet Headers
PSI Springs

The only difference? CNC Heads.

Are CNC Heads actually worth the extra money? Let’s find out

25/05/2026

The LFX continues to deliver impressive results!

This one came in for an intake and tune package, already fitted with a few owner-installed modifications that clearly helped the final power result. 👌

GMMotorsport Custom Tune
72mm Ported & Polished Throttle Body
25mm Intake Insulator
Manifold Agitators Removed
2.5” Xforce Cat-Back
Xforce Mani-Cat
Orrsom OTR

Address

23 Reserve Road
Melton, VIC
3337

Opening Hours

Monday 8am - 5:30pm
Tuesday 8am - 5:30pm
Wednesday 8am - 5:30pm
Thursday 8am - 5:30pm
Friday 8am - 5:30pm
Saturday 8am - 1pm

Telephone

+61397466656

Website

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