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 -

Grunt Performance @ WTAC 2013

Grunt Performance @ World Time Attack Challenge 2013

The Grunt Performance Team is excited to announce that they are attending WTAC 2013 on Friday 18th & Saturday 19th October. Join us & see time attack teams from around the world compete for the ultimate title - the World Time Attack Champion! The event also consist of the Tectaloy International Drift Challenge on Friday night, Show'n'Shine, Group B Rally Cars and much more.

Not familiar with WTAC 2013?

The World Time Attack Challenge or better known as Superlap, originated in Japan in the 1980s as a proving ground for street-tuned cars built by world renowned tuning companies. The setup is similar to qualifying in traditional motorsport, with competitors racing against the clock with the fastest single lap taking out the prize. This setup allows almost unrestricted modifications making for extremely spectacular on-track action. Expect to see loads of high horsepower, light-weight & aero-enhanced cars.

So what to expect @ WTAC 2013?

The WTAC 2013 offers 2 days of motorsport; with non-stop Time Attack and Drift action plus Turbo Legends, Flying 500 top speed challenge, a great trade displays. Grunt Performance will be exhibiting 2 new projects, showcasing their extensive custom fabrication and paint & panel work. The Grunt Team will have race apparel & components on show & available to order, including MoTeC, Alpinestars, Velo & Daniel Young Composites.   

If you only attend one motorsport event this year - make sure it's the World Time Attack Challenge. For more info visit: