AS SOON as Brett Bresnan popped the bonnet of his HR Holden wagon in the Real Street display at this year’s Meguiar’s MotorEx and we peeped the blower, we knew we had to grab him for chat to find out more about this combo.

First published in the July 2026 issue of Street Machine

It’s a neat blower set-up, mate! Tell us a bit about it.

The engine itself is basically a stock 202, just with some cast pistons and Starfire rods. It actually had five different turbo set-ups on it, before one day I woke up and decided I wanted a blower. It’s a Magnuson MP90 blower, similar to the M90 that the L67 used here, but I’d imagine a lot more efficient.

And you’re running injection on it, too! What sort of power is it making?

It’s making 225hp on 15psi of boost. It runs a Megasquirt ECU, and uses LS coil packs instead of the distributor, which just has a sensor in place now. I started a business in 2006 called Sonic Injection, which was originally built around the idea of putting injection on older motors. I took one of the four-barrel manifolds from Sonic and changed it with help from BPE to suit the blower.

Where did the desire to throw EFI at these old things come from?

We did a bigger camshaft on a mate’s VK Commodore with the injected 202, and figuring out how to get more fuel into the thing to suit the cam was fascinating to me. Even just playing with the fuel pressure and figuring out what injectors worked best, it really kindled my love for putting injection on these old motors. So, I started Sonic Injection to offer kits and parts to customers that I could only dream of when I was 18 years old. But I sold the business about five years ago; I was spending more time making customers’ aspirations come true over my own! I drive a truck now doing car transport, so I have more free time to play with the HR.

How long have you had the wagon?

I’d say around 13 years, and it’s always evolving! I love building things and progressing the car, but I also love using it – it would’ve done 4500 miles with the blower set-up. I’ve built the car to be fun but simple, so the wife can hop in and drive it no worries. It has HQ disc brakes on the front, a Trimatic transmission and a BorgWarner diff. 

That cool rocker cover surround gets a lot of attention.

I made that one myself, inspired by the factory cover on my friend’s R34 Skyline. He pulled the cover off that RB25 Neo engine one day, and I saw all the wiring under it and decided to copy the idea. I made it all out of steel, and it has the fuel pressure gauge visible through it. I laser-cut the spur on it, and it’s held on by magnets!

There’s a cool pair of seats on the inside of the tailgate; who did those?

I did! I was inspired by Jaime and Allison Cramp’s XW Falcon panel van (SM, Nov ’24). I ordered the vinyl, did an online class on YouTube, and learned how to stitch it all together. We love taking this to car shows, and there’s always one person who forgets a chair, so, rather than sit on a cold tailgate, I figured I’d do the chairs, and a nice spot for a stubby as well.

What’s next for the HR?

Next is to go drive-by-wire, mainly to get rid of the throttle cable and clean the engine bay up a bit more. I’m always looking to improve it a little bit. People sometimes question why I didn’t stay carby, but I say carbies are like potatoes – they shouldn’t be used to put fuel in an engine! This car does 12L/100km, which is better than a mate’s 202 with triple Strombergs, and that’s with some enthusiastic driving in the mix.