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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.

04/09/2026

The Turbo Killer is back for Lumpy Fridays! 🔥

George’s super clean VZ SS came in for the full GMMotorsport Head & Cam package, paired with a Dominator 3200 stall and a full XForce exhaust system.

Safe to say the neighbours now know what time George leaves for work 😂

Big power and big chop. Exactly how a VZ SS should be! 💪🏼🇦🇺

02/09/2026

The mighty RAM 1500 gets the full Ramjet Performance treatment with our Double Stepped Tri-Y Full Exhaust System! 🔥

Designed to replace the factory exhaust manifolds, which are known to be prone to cracking, while also delivering improved performance and a much tougher V8 note.

More RAM owners are getting behind the Ramjet system as they see just how much R&D has gone into getting the design, fitment, sound and performance right.

The results speak for themselves. 💪

31/08/2026

Big Turbo Killer Camshaft + GMM V3.5 CNC Heads = MASSIVE Power Gains! 🔥

The GMM Turbo Killer Camshaft still remains one of the best off-the-shelf camshafts on the market for chasing maximum peak power!

This combo is backed up with:

🔥 GMM Turbo Killer Camshaft
🔥 GMM V3.5 CNC Heads
🔥 Dominator 3200 Stall Converter
🔥 3.7 Diff Gears
🔥 Full XForce 3” Exhaust

A proven combination built to make serious Gm Motorsport power! 💪

28/08/2026

Lumpy Fridays is chopping HARD with the Gm motorsport CR Camshaft 🔥

This sexy red VE GTS just scored the new Gm motorsport Chopper Reid Camshaft and CNC Head Package, and it sounds absolutely mental.

14/08/2026

Lumpy Fridays with the Chopper Reid Camshaft! 🔥

This beautifully put-together VE GTS came in for the GMMotorsport Head & Cam Package, featuring our Chopper Reid Camshaft.

A proven street combination with that tough, unmistakable idle, strong performance and plenty of attitude. This thing is guaranteed to turn heads everywhere it goes! 💪

12/08/2026

Relive the moment Phonsy claimed his first World Championship for Australia 8 years ago! 🏆

Powered by a GMMotorsport-built 1600HP Twin Turbo LS 445, Phonsy took on the world and came out on top.

Seven years later, in 2025, he did it all over again. Returning to the world stage and claiming his second World Championship! 🏆🌎

Two World Championships. Seven years apart. What a journey. 🔥

10/08/2026

Did we lose power when we shut the bonnet? 👀

We put this particular OTR to the test, running it back-to-back with the bonnet up vs bonnet down to see if it made any difference.

This wasn’t a video we planned on making, but once we saw the results, we knew we had to share them with you guys.

Watch the video to see exactly what happened on the dyno! 📉
Did you expect these results? We’d love to hear your thoughts in the comments! 👇

04/08/2026

Full Exhaust, Intake & Tune Package! 🔥

Yes, we're still building plenty of these packages, and for good reason. It's one of the best ways to transform your stock Holden with more power, better throttle response, and an unreal exhaust note, all without breaking the bank.

Ready to take your Holden to the next level? Get in touch today! 👊

29/07/2026

Another Ram Full Exhaust & Tune Package out the door! 🔥

Ram owners are loving this simple yet highly effective upgrade, delivering improved fuel economy, stronger low-down torque, and the tough V8 sound these trucks deserve.

The Ramjet Exhaust System continues to prove why it's the benchmark to beat. 💪

28/07/2026

Back-to-Back CNC Ported Intake Manifold Test! 🔥

We put our CNC Ported Intake Manifold to the test with a true back-to-back dyno comparison under identical conditions.

The only change? The intake manifold was swapped on the dyno, then the car was run again within the same hour. 📈

The results speak for themselves. A simple upgrade that delivers real power gains for anyone looking to get more out of their setup. 💪

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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