Performance and Restoration
Mechanical Auto Upgrade Services in DeKalb, IL
Mechanical Upgrades Packages
Engine Work and Power Upgrades
Services May Include:
- Complete engine replacement or rebuilds
- Carbureted-to-fuel-injection conversions
- Engine bay restoration & detailing
- Performance upgrades
- Intake manifolds
- EFI systems
- Headers & exhaust
- Cooling system upgrades (radiators, electric fans, shrouds)
Optional Add-On:
- Engine bay transformation
- Paint
- Wiring cleanup
- Chrome accessories
- Hose replacement
- Rerouting for clean, modern look
Transmission Conversion and Drivetrain Upgrades
Services May Include:
- Manual-to-automatic conversions
- Overdrive transmission swaps (700R4, 4L60E, Tremec 5, 6 speed, etc.)
- Clutch system repairs/replacements
- Driveshaft upgrades
- Shifter upgrades (floor shift conversions)
Suspension and Handling Upgrades
Services May Include:
- Lowering kits/drop spindles
- Complete suspension rebuilds
- Upgraded shocks & springs
- Power steering upgrades
- Handling packages for classic trucks & muscle cars
- CPP, QA1, Ridetech systems in Rough Country
Brake System Upgrades
Services May Include:
- Disc brake conversions (front or 4-wheel)
- Brake booster installations (power brake conversions)
- Line replacement
- Master cylinder upgrades
- Performance brake kits
Electrical and Wiring Upgrades
Services May Include:
- Full wiring harness installations
- Engine bay rewiring
- Lighting upgrades (LEDs, OEM-style)
- Instrument panel/gauge wiring
- Alternator upgrades
Comfort and Convenience Upgrades
Services May Include:
- Vintage Air AC system installations
- Heater system refresh/replacements
- Power window conversion kits
- Bluetooth radios & speaker upgrades
- Custom interior electrical integration
Preventive and Reliability Services
Services May Include:
- Tune-ups
- Fluid changes
- Fuel system repairs
- Cooling system service
- Safety inspections
- Pre-restoration mechanical checks
DeKalb, IL’s Destination for Mechanical Work and Upgrades
From factory-correct rebuilds to smart modern upgrades, Apex Auto Restoration handles mechanical work the right way for classic cars, trucks, and custom builds. Our team knows old-school systems inside and out, and we’re just as comfortable integrating modern performance parts without turning your project into a hacked-together science experiment. Whether you want better drivability, more power, or a weekend cruiser you can actually trust, we deliver clean, professional work that looks right, runs right, and matches the same high-detail standard we bring to every restoration.
CALL (815) 995-0968
Answering Top Mechanical Services FAQs
1) What kind of vehicles does Apex work on for mechanical upgrades?
We’re built for classic cars, classic trucks, and custom builds that need real mechanical attention, not generic quick-fix work. If it’s carbureted, wired like a spaghetti bowl, or running a drivetrain that’s tired from decades of use, we’re in our element. And if you want modern performance integrations like EFI, overdrive transmissions, upgraded brakes, or better cooling, we can do that too, while keeping everything clean and cohesive.
2) Can you rebuild my engine, or do you only do performance upgrades?
We do both, and we’ll help you choose what actually makes sense for your goals. If you want factory-correct, we can rebuild and keep it true to the original vibe. If you want more power and better drivability, we can step into camshafts, intake manifolds, headers and exhaust, EFI systems, cooling upgrades, or even a full engine replacement. Either way, we’re not just making it run. We’re making it run right.
3) I’m tired of high RPM cruising. Can you do an overdrive swap or transmission conversion?
Absolutely. Overdrive swaps are one of the best upgrades you can make if you want your classic to feel more relaxed on the road, especially on the highway. We handle manual-to-automatic conversions, overdrive transmission swaps like 700R4 and 4L60E, clutch system repairs, driveshaft upgrades, and shifter conversions like floor shift setups. The goal is simple: smoother driving, better gearing, and a drivetrain that feels like it belongs in the build.
4) Do you offer suspension and brake upgrades, or is it mostly engine work?
We’re all about the full driving experience, and that means handling and stopping matter just as much as power. We do suspension rebuilds, lowering kits and drop spindles, upgraded shocks and springs, power steering upgrades, and handling packages for classic trucks and muscle cars. On the braking side, we handle disc brake conversions, power brake conversions with boosters, line replacements, master cylinder upgrades, and performance brake kits. If you want it to look tough and drive tight, this is where it happens.
5) Can you clean up wiring and add modern comfort upgrades without making it look hacked together?
Yep, that’s the whole point of doing it the Apex way. We do full wiring harness installations, engine bay rewiring, lighting upgrades, gauge and instrument wiring, and alternator upgrades, with a focus on reliability and a clean finish. On the comfort side, we can install Vintage Air AC systems, refresh heater systems, add power windows, upgrade radios with Bluetooth and speakers, and integrate interior electronics the right way. You get modern convenience, without the mess of random wires and mystery switches.
Let’s Build it Right
Got a classic car or truck that needs mechanical work, or ready to level up with the right upgrades? Call Apex Auto Restoration to talk through your goals, get a clear plan, and schedule your next step. Reach us by phone or email, or use our contact form and upload a few photos so we can see what you’re working with and point you in the right direction.
CALL (815) 995-0968
Why Choose Apex for Mechanical Work and Upgrades?
We Know Classics Inside and Out
Classic cars and trucks have their own rules, quirks, and weak points, and that’s exactly where experience matters. Our mechanical team understands vintage systems, how they’re supposed to work, and where they usually fail after decades on the road. You’re not getting guesswork or generic shop logic. You’re getting people who actually know classic platforms and how to make them run the way they should.
Modern Upgrades That Still Feel Right
Want EFI, overdrive, better cooling, or tighter handling without turning your build into a weird mashup? That’s what we do. We’re big on smart integrations that improve drivability and reliability while keeping the vehicle’s character intact. Everything is planned, matched, and installed cleanly so the upgrades work together and make sense long term.
Clean Work You’ll Be Proud to Pop the Hood On
A lot of shops can make parts fit. Fewer can make the whole install look intentional. We care about the details, from wiring and routing to fitment and finish, because mechanical work should look as good as it performs. If your engine bay matters to you, you’re in the right place.
Built for Drivability, Not Just a Quick Start-Up
It’s one thing to get a classic running. It’s another thing to make it enjoyable to drive. We focus on the stuff that actually changes your experience behind the wheel, like smoother shifting, better braking, stable temperatures, predictable handling, and electrical reliability. The goal is confidence, not crossing your fingers every time you turn the key.
Straight Talk, Clear Plans, and No Upsell Energy
We’ll talk through your goals, budget, and how you plan to use the vehicle, then recommend a build path that fits. If you don’t need it, we won’t push it. If there’s a smarter way to spend your money, we’ll tell you. You’ll always know what’s happening, why we’re doing it, and what the next step looks like.
We Treat Every Upgrade Like It’s Part of the Whole Build
Mechanical work isn’t a checklist. It’s a system, and every change affects something else. That’s why we approach upgrades with a big-picture mindset, making sure your engine, transmission, cooling, suspension, brakes, and wiring all play nice together. You end up with a vehicle that feels dialed in, not pieced together.
CALL (815) 995-0968
