Home > Holden > VT - VZ | 5.7LT / 6.0LT > G4S-320 Power Package

G4S-320 Power Package

  • Flywheel Power: LS1=300kw LS2, L76=320kw
  • Price: $2,595 Supplied & Fitted
  • Model Compatibility: VT-VZ V8
  • Installation Time: 1 Day

"Good power gains, noticeable power and torque increase across the board and that great V8 sound!"

The G4S320 upgrade starts with our trained technician fitting an over the radiator cold air intake with a high flow re-usable air filter and a new dual 3” cat back exhaust system all to increase the engines breathing capabilities and to give it that nice “V8” sound we all love. After all the new performance components are fitted we custom tune your vehicle’s ECU on the dyno utilizing the latest tuning software to maximize power, torque and fuel efficiency.

We complete the upgrade process by testing your vehicle on the road to make final adjustments, optimizing you vehicles performance and driveability. This is all completed in a day and at the end of this upgrade you will be provided with a dyno graph detailing the power & torque increase of your vehicle.

Package Includes

  • 1 x ECU – reprogram – MAFLESS tune
  • 1 x Dual 3″ cat back exhaust system, mandrel bent mild steel
  • 1 x HP-F over the radiator cold air intake & high flow air filter
  • 1 x Before and after dyno graph
  • 1 x All labour to fit / dynotune / test

More Information:

Click here to learn how to read a dyno graph.

HPF Warranty

HPF power packages are warranted for the parts and services installed by HPF. Please contact us for more information.

Additional Notes

  • We recommend all vehicles coming to HPF for tuning run 98 Octane fuel. Please contact us if you have a need to use different fuel.
  • Power figures listed are estimated kilowatts at the flywheel based on results typically obtained by HPF on HPF’s dynos. Typically these are based of a manual vehicle with standard driveline and standard wheels and tyres. Actual power can vary based on each specific vehicle.
  • Modifications such as this package require the vehicle to be in excellent mechanical order.
  • We advise against increasing the power output substantially on high kilometer engines, if your engine has in excessive of 150,000kms please contact us to discuss options.
  • Whilst every attempt is made to ensure prices listed online are correct, they are subject to change at any time.
  • Additional parts may be required in some cases depending on the condition of the vehicle. Cost of these parts and additional labor required may incur additional cost.

22 Comments please add yours...

  1. avatar

    Hi guys I have vzss has carback exhaust right through so I am wanting a package with tune and headers can you give me a ruff price on that thx as I see the first cpl packages come with catback as I already have is red back brand

  2. avatar

    Hi guys I have a vz ssz crewman with 95000km. Would the 320kw package be suitable for this car? Regards Dean

  3. avatar

    Hi Guys,
    I am thinking of getting this G4S-320 Power package for my VT Clubsport. It has done 250,000km, but still runs great. Do you see an issue with doing this mod?
    I was also thinking of doing G4S-HC420 Heads and Camshaft Power Package in the future. Would there be any issue with doing this?

    • avatar

      Hi David, As long as the car is in good condition and serviced regularly I don’t see a major problem with doing the 320 package. When doing the G4SHC420 I would factor in some extra funds for some additional parts that may be required due to the age of the car like, Gaskets & seals, oil pump, Timing chain dampner etc.

  4. avatar

    Hi Guys,
    I am thinking of purchasing this for my WL Caprice which has done 270+kms.
    Would it still be a dual 3” cat back? or a single.
    And if so, would there be a price difference?
    Thanks in advance.

    • avatar

      Hi Alan,

      The exhaust would be dual 3″.

      The pricing may change as the vehicle has done a few kays, we may need to replace more parts but until it comes apart i could not quote you.

  5. avatar

    hey guys

    do you have a video of this system fitted to a vz commodore?

  6. avatar

    Do u have a walkn shaw package with 500 rwhp for a vy ss

  7. avatar

    What brand of exhaust system do you put on the cars?

  8. avatar

    Hey guys i have got a Holden Adventura VY series 2 with approximately 235 KW what kind of realistic power increases can i expect with this $3200 package and what kind of figures does this translate to at rear wheels

    Cheers Kurac

  9. avatar

    Hey guys,
    I have a vy ss ute, was wondering i already have a big mouth cold air intake, if i was to get this package what would the price be? also is it a full 3inch exhaust? include heads? cheers

  10. avatar

    I noticed you have payment plan options for walkinshaw packages advertised on your Facebook page. I was wondering if that same option applies to this G4s -320 Power Package?

    Thanks in advance.

  11. avatar

    hey guys, this is a stupid question but i’m gonna ask anyway….do you guys do finance or just straight up cash?

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