Harman Brothers Racing

12/05/2026

Fuel economy wasn’t in mind when Dodge decided to fit a Viper V10 and 6 speed manual into a pickup truck, but fun definitely was!
We had this beast in for tuning last year after the owner carried out some extensive engine work including camshaft and cylinder head upgrades.
The end result was 573hp/427kW’s at the wheels, making it one of the most powerful naturally aspirated vehicles we’ve had on the dyno!

26/11/2025

🚨BLACK FRIDAY SALE NOW LIVE🚨

We will be offering 10% off all Walkinshaw Performance products for one week only! So there’s no better time to Walkinshaw enhance your ride than right now
✅ Holden/HSV W-Packages
✅ Chev 1500/2500 Fury Packages
✅ Walkinshaw Exhaust Upgrades
✅ Walkinshaw GVM Upgrade
✅ Engine Accessories & much more

*Promotion excludes Walkinshaw Superchargers. Ends 1/12 @ 5pm.

05/11/2025

Just released! Walkinshaw Performance TVS2650 Supercharger Package for Holden/ HSV LS3 Commodore variants.
The ultimate upgrade for your LS3 6.2 V8 powered Holden VF / HSV Gen-F.

Learn more - https://www.walkinshawperformance.com.au/commodore/ls3-supercharger/?fbclid=IwY2xjawN3hQpleHRuA2FlbQIxMABicmlkETFCWGlPU0NQSzc4YVBna3F5c3J0YwZhcHBfaWQQMjIyMDM5MTc4ODIwMDg5MgABHm4a10b8MyP30sBNVBn7GuYWfEi9ovqZ22NiPh9tBGb7HPTH6X9bnrSzZ3Ok_aem_RmB2RLzL1fXWYaz3w0JcVg

03/09/2025

MEET VINCE'S BEAST!
Vince has had this very tidy E2 HSV Maloo from new and when it came to giving it a birthday he trusted the experts.
We added:
• Mild cam package with lifters and oil pump
• Performance exhaust
• Cold air intake
• Custom dyno & transmission tune

Result? +100hp and 120nm at the wheels! And it still drives like a dream. "Bloody awesome..." - Vince. Ready for your own transformation? Get in touch.

16/07/2025

We are now an official dealer for Walkinshaw Performance!
Walkinshaw is a name synonymous with success both on and off the track and we are proud to be aligned with another highly regarded brand in automotive performance.
We can now offer all of the WP VE/VF Commodore upgrade packages from W375 through to W557, as well as a range performance parts including supercharger kits and exhaust systems for the big American trucks such as Chevy Silverado and Dodge Ram. Please get in touch if you're interested in a WP upgrade!

NZ's leading Holden, HSV and GM LS, Ford and Diesel engine dyno tuning and powertrain upgrade specialists.

01/05/2025

It’s been LSA’s for days at HBR recently!
Our upgrade packages have been transforming these cars from mild to what they should’ve been from the factory! The gains from these things are insane. So much potential, and the strong factory drivetrain makes them ideal to modify 💪🏼💪🏼

24/01/2025

2024 was a huge year!
VE and VF Stage 4 packages were extremely popular. We did over 10 LS cam upgrades in the last couple of months of the year! With such awesome results it’s not hard to see why. We love it!
This year is starting off strong and we can’t wait to share some awesome projects with you.
Don’t forget to come have a yarn at Muscle Car Madness in Rangiora tomorrow!

07/10/2024

This Australian based customer recently sent his VY SS down from his NZ base of Nelson to have a cam and lifters fitted.
We could see the engine was leaking oil and looked a bit neglected from the outside, but it was even worse on the inside. Previous owners obviously hadn’t serviced it regularly and there was a lot of carbon build up on the inside of the engine. The owner wanted long term reliability so we gave him the option of rebuilding, or replacing the LS1 with an LS2 we had in stock. He decided to upgrade and go to the larger 6.0 LS2. We fitted the cam and lifters he supplied, had the trans rebuilt and gave it a full birthday 🥳.
👉🏻 Power 181 to 303kW at the wheels +67%!
👉🏻 Torque 386 to 602nm at the wheels +56%!

14/08/2024

Here are a couple of VF2 SS-V Redline’s we had in last month. Both getting our very popular Stage 4 upgrade package which includes -
✅ Full stainless exhaust system
✅ Harrop cold air intake
✅ Performance cam package
✅ Custom ECU dyno tune
✅ Custom transmission tune
✅ + 35% power + 25% torque
This package completely transforms these cars with both amazing sound and performance. There’s so much potential there just waiting to be unleashed!
Don’t hesitate to get in touch with any upgrade enquiries.