Holden diagnostics

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Holden diagnostics Mail order or dyno tuning and performance parts
ECU replacement and security relinking
Custom conv Specializing in Holdens from VR to VF.

Bench test simulation, ecu replacements and programming, diy scantools and upgrades, Ecu tuning and custom conversion programming.

03/11/2026

Logan brought his VF SV6 in for a tune after fitting headers, exhaust, and OTR. He mentioned it felt like it had lost a bit of power since adding the mods and wasn’t running so good.
We did a base run at 140rwkw and 307nm peak
After tuning - 199.8rwkw and 380nm peak. A 60rwkw gain peak, with over 100nm gain from 4000rpm up! Unreal. If you’ve got one, booked in with us!

20/10/2026

How good did the monster trucks in Wellys look!

05/10/2026

What a cool event!

29/09/2026

🔥 WIN A FAMILY PASS TO SUMMER OF CARNAGE! 🔥

We’re giving away a FAMILY PASS to Summer of Carnage at Whanganui Speedway this weekend! 🏁🔥

TO ENTER:
👉 LIKE this post
👉 COMMENT below and tag who you’d bring along!

Sharing isn’t required, but we’d love you to SHARE it around and get the word out! 🤘

🏆 Winner drawn at 8PM Thursday!

We’ll be there this weekend helping put on a show, so come down, say hi and enjoy some carnage! 🔥💨

Family pass is either
2 adults + 2 children
Or
1 adult + 3 children

⚠️ We’ll announce the winner from this page.

24/09/2026
22/09/2026

The boys are getting ready for AutoFest!
0tyres Burnout Car
Peter Clarkson

19/09/2026

Autofest prep 26!!

07/09/2026

🔥 ARE YOUR MUFFLERS COSTING YOU POWER? 🔥

Flowmaster 40 Series mufflers sound good… but are they really worth a 40rwkw loss?! 😳

Even we were surprised by just how much of a restriction these mufflers proved to be on the dyno.

Back to back run, same timing, same AFR
The difference? Nearly 40rwkW just from removing the restriction.

They might give you that classic Flowmaster sound, but when you’re chasing power, flow matters!

Sometimes the restriction isn’t where you expect it. 👀

10/06/2026

Longer video with some explaining.
VY HSV with VCM714 camshaft OTR, and stock exhaust.

Address

Feilding
4702

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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