Contact Us

Please be advised that workshop visitation is strictly by appointment only, please call in advance to arrange a suitable date & time

CHRISTMAS CLOSURE: We will be closed for business from December 22nd 2018 until January 15th 2019.

Office Opening Hours:

Monday: CLOSED

Tuesday: 8:00am - 4:00pm

Wednesday: 8:00am - 4:00pm

Thursday: 8:00am - 4:00pm

Friday: 8:00am - 4:00pm

Saturday: CLOSED

Sunday: CLOSED

*Note, workshop and office can be closed without notice, due to event commitments

Phone: (03) 9789 1576

Postal Address:

PO Box 61
Baxter VIC 3911


Latest News

    📢 Introducing -: MILLDUN Motorsport 📢

    The fresh new face of Grunt Performance!!

    Over the coming days you will notice some exciting changes, but don’t fret.... we are still the same company - same great service & all our existing contact details will remain...
    We are just evolving & are excited to have you all along for the ride! Let’s do this!!

    Introducing MILLDUN Motorsport

    We're on the move

    WooHoo...We're Moving!!! We are excited to announce we are now closed for relocation to our exciting new purpose built, state of the art workshop! Stay tuned for more updates.

    For all enquires or to make an appointment for the new year you can email us at

    We're on the move

    Round 2 – VSCRC - Phillip Island

    Improved Production - Victorian Championship Round 3. April 15th – 19th 2015

    Congratulations to Tony Groves for this 2nd podium finish for the year, finishing 2nd in Improved Production!

    Awesome work by Tony Groves in the Mornington Mazda Racing RX-7.

    Day 1. - Qualifying 2nd & finishing 2nd in Race 1.

    Day 2. – Race 2. finishing 2nd & Race 3. finishing 4th

    Watch out for Tony & the Grunt Performance Team @ Sandown May 15th – 17th

    Photo thanks to - IPRA Victoria (

    Results - Round 1. VMRC - Winton

    Congratulations to Tony Groves on his first podium finish!

    After an eventful test day, Tony came out to show us all just what a talented & focused driver he is, walking away with 3rd for the weekend. 

    Keep an eye out for the Mornington Mazda Racing RX-7 at Phillip Island next month!

    Round 1. VMRC - Winton

    Grunt Performance will be attending Round 1. VMRC @ Winton Motor Raceway ( - 7th - 8th March 2015.

    Look out for Tony Groves of Mornington Mazda Racing in car 80, running in Improved Production.

    For more info on the event visit -

Terms of Trade – Grunt Performance Australia Pty Ltd

By engaging in the services of Grunt Performance Australia Pty Ltd, the customer in turn agrees to the following Terms of Trade.

The customer hereby gives Grunt Performance authority to carry out the work and repairs to the vehicle, as discussed with the customer, at the customers cost and any other work Grunt Performance considers essential. These works will be undertaken as soon as Grunt Performance can conveniently attend to it at, Grunt Performance’s current rates for parts and labour used. The customer acknowledges, agrees and/or understands that:

  1. The customer will not hold Grunt Performance responsible for any damage, liability arising or injury caused by performance enhancing components or work, which Grunt Performance fits or does.
  2. The customer accepts the risks associated with attending or participating in Motorsport & will not hold Grunt Performance responsible for any damage, liability arising or injury caused during any Motorsport Event, Motorsport Testing or Driver Training Event.
  3. The work, which the customer has authorised, may: Affect my insurance policy as well as legality of the vehicle for normal road use. This includes EPA requirements for noise and emissions, Affect any manufacturer’s warranty that might otherwise be applicable to the vehicle.
  4. The vehicle may be driven for testing, to move it to another workshop or for any purpose incidental to the repair thereof.
  5. Grunt Performance will not be responsible for the loss or damage to the vehicle, its accessories or contents howsoever caused unless arising from negligence on the part of Grunt Performance or its duly authorised agents, servants and employees.
  6. Subject to the provisions of any statute, any claim for faulty workmanship shall be limited solely to the rectification, free of cost, of the faulty work. No claim or loss consequential or otherwise will be admissible.
  7. Payment of all works must be made in full on the date of invoice. Further work to the vehicle will only continue once payment has been received. Any amount outstanding for greater than 30 days will attract interest, charged at a rate of 10% per annum.
  8. Payment for all works shall be finalised prior to the vehicle being removed from Grunt Performance. Failing payment Grunt Performance shall be entitled to exercise a lien over the vehicle, its accessories or contents, and/or any parts installed by Grunt Performance to the vehicle.
  9. Grunt Performance will be entitled to reasonable storage charges (of $20.00 per day) if the customer fails to take delivery of the vehicle within 2 days after notification that the repairs have been completed. Unless otherwise agreed upon.

Nothing herein shall exclude, restrict or modify any conditions or warranties, which may be implied herein by virtue of the Competition and Consumer Act 2010, or otherwise where such purported exclusion, restriction or modification would render any provision hereof void. The customer also understands that in the event of any damage or the theft of my car, unless negligent, The customer will claim on his/her personal insurance at his/her expense.

The customer accepts the foregoing conditions, which he/she has read and the customer gives notice to Grunt Performance that their place of abode for the purpose of section 17 (2) (2) (c) of the disposal of uncollected goods act is as set out above. Where the customer is not the owner of the vehicle:

  1. The customer warrants that he/she is authorised to act as the agent of the owner and to bind the owner, and
  2. The owner and customer are jointly and severally bound to these terms of trade.

* Grunt Performance Australia Pty Ltd Term Of Trade are displayed on their website – & at reception. A copy of Grunt Performance Australia Pty Ltd Term Of Trade are available to all customers upon request.