Redline Automotive
Darwin's Performance Tuning & Automotive Specialists
From bolt-on upgrades and ECU tuning to complete engine builds and everyday servicing, we’ve been getting it done under the hood for over 25 years. Quality parts, dyno-verified results, and honest advice. That’s how we operate.
Our services
Performance, Mechanical and Machining. All Under One Roof.
Most workshops send work out. We don’t have to. Our Darwin workshop runs a full in-house machine shop alongside dyno tuning and everyday mechanical services, so your vehicle stays in one set of hands from start to finish.
Performance Tuning & Custom Builds
Whether it’s a street car, a tow rig or a weekend track weapon, this is where we really come alive. We build and tune engines in-house using parts and brands we’ve personally tested through our own racing program. No off-the-shelf tunes, no guesswork. Every calibration is custom-built on our dyno with EGTs, boost control and reliability locked in, and tuned to handle Darwin’s heat and towing loads.
Diesel, Petrol & Dyno Tuning
Our in-house dyno lets us measure, tune and verify every modification for safe, reliable power. We tune both petrol and diesel platforms, from ECU remapping on turbo-diesel tow rigs to custom Haltech calibrations on performance petrol builds. For diesel vehicles, our remapping regularly delivers 25-35% gains in torque and power alongside 2-4 L/100 km in fuel savings. For petrol, every tune is built around your specific combination, with EGTs, boost and AFRs verified live on the dyno.
Machining & Engineering
We’re one of the only workshops in the Northern Territory with a full in-house engine machining facility. Head surfacing, boring, honing, crankshaft work, and block machining. It all happens here. That means faster turnaround on engine rebuilds and performance builds, and no waiting around for parts to come back from interstate.
Mechanical Services
Logbook servicing, brakes, suspension, electrical diagnostics, air conditioning and scheduled maintenance for all makes and models. We also work extensively with Toyota vehicles, so if you’re after a trusted Toyota mechanic in Darwin, we’ve got you sorted.
Towing Services
Recovery and drop-off, coordination with insurers, and same-workshop follow-up repairs so you’re not bouncing between providers. One call and we handle it from the roadside back to the workshop.
Call us today and arrange your next appointment
Visit our Workshop
Workshop Location
Workshop Hours
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
8am – 5pm
8am – 5pm
8am – 5pm
8am – 5pm
Closed
Closed
Vehicles We Work On
Trusted by Darwin Drivers Across Every Make
From daily commuters and family 4WDs to performance builds and turbo-diesel work rigs, we service all makes and models at our Winnellie workshop. We work extensively with Toyota, Ford, Nissan, Isuzu and Holden vehicles, and our team has the experience and equipment to handle everything from logbook servicing to full custom engine builds. If it’s got an engine, chances are we can help.
Why Choose Redline
Straight-Up, No Nonsense
We’ve been under the hood in Darwin for over 25 years, and we’ve learnt one thing: people want a mechanic they can trust. No upselling, no mystery problems. Just honest work, fair prices, and a team that genuinely cares about your vehicle.
- Built for NT Conditions: Every tune and build is calibrated for Darwin's heat, towing loads and long-distance driving. Reliability first, always.
- Performance-First Workshop: ECU tuning, custom builds, forced induction and dyno-verified results using parts we race with ourselves.
- Full In-House Machining: One of the only engine machining facilities in the NT. Head work, boring, honing and crank machining without sending anything interstate.
- Honest Pricing: We recommend what your vehicle actually needs. No unnecessary upsells, no inflated quotes.
- One Roof, One Team: Machining, tuning, mechanical servicing and towing all happen here. Your vehicle stays in one set of trusted hands.
More about us
Cars Are in Our Blood
We started with Derreck, who built his first engine in his backyard at 18. That passion for racing and tinkering grew into a business that’s been trusted in Darwin for decades.
Today, the Sperrer family keeps the tradition alive, blending hands-on experience with the latest tuning and diagnostic technology to give locals a workshop that can handle it all. From your daily driver to a full competition engine build, we treat every vehicle like it’s our own.
Testimonials
wHAT OUR CLIENTS SAY ABOUT US
Frequently Asked Questions
What types of vehicles do you service?
We service all makes and models, from everyday commuters and 4WDs to performance cars and turbo-diesel work rigs. We also specialise in Toyota vehicles and can keep your logbook valid with manufacturer-compliant servicing. If it’s got an engine, chances are we can help.
Do you do performance modifications?
Yes, and it’s what we’re best known for. We handle everything from bolt-on upgrades like air intakes and exhaust systems through to full custom engine builds with forced induction, Haltech engine management and dyno-verified tuning. Every build uses quality parts from brands we’ve personally tested in our own racing program.
Can you rebuild my engine?
Absolutely. With our in-house machine shop, we can handle full engine rebuilds from start to finish without sending work interstate. That includes head surfacing, boring and honing, crankshaft machining, and fitting forged internals. Once the build is complete, we tune and verify it on our dyno before it goes back in your vehicle.
How much will my repair cost?
We provide honest, upfront quotes before any work begins. Once we’ve inspected your vehicle, we’ll walk you through exactly what’s needed and what it’ll cost. No surprises, no hidden fees. If anything changes during the job, we’ll call you first.
Can you work on marine engines?
Yes, we provide machining and engineering services for marine engines alongside our automotive work. Our in-house machine shop is equipped to handle head work, block machining and other engine services for boats and marine applications. Give us a call with the details, and we’ll let you know how we can help.
How much power can a tune add to my vehicle?
It depends on the platform. Diesel tunes typically deliver 25-35% gains in torque and power, along with 2-4 L/100 km in fuel savings. Petrol gains vary based on existing modifications, but we’ll always give you measurable, dyno-verified results rather than guesswork. Book a chat, and we’ll talk through what’s realistic for your vehicle.
Ready to Talk Performance?
Whether it’s a simple tune, a full custom build or just your next service, give us a call, and we’ll point you in the right direction. No pressure, no sales pitch. Just a straight-up conversation about what your vehicle needs.