SEMA 2024: FiTech Ultimate Sync 48X Fuel Injection System

FiTech Ultimate Sync close up

FiTech is here to shake things up and bring modern fuel injection technology to classic engines with the Ultimate Sync 48X system for small-block Chevy applications. For those wanting a kick in their engine while keeping the heart of their classic car intact, this setup is ideal for versatility. FiTech’s Fred Najera was on hand at SEMA to tell us about how this kit brings the old-school power from small-block Chevys together with new-school features a modern LS engine offers, without having to go all-in for an LS swap.

So, what sets the Ultimate Sync 48X system apart? It’s all in the details. The heart of the system is this dual-sync “distributor” that acts as both crank and cam sensor, instead of distributing spark. This combination exactly aligns the timing, so that each injector fires in perfect harmony with the engine. The result? More power, smoother delivery of that power, and an entire system that is better integrated. All resulting in improved ignition control and more optimized fuel delivery.

FiTech designed the Ultimate Sync 48X fuel injection system with flexibility in mind. Whether you’re ready for a full overhaul or just looking to upgrade key components, this kit has you covered. Go all-in with the complete package — including the Ultra Port manifold, throttle body, fuel rails, injectors, and ECU — or pick and choose from individual components like coils, harnesses, or the distributor-replacing cam and crank position sensor. This means you can take your time and customize your setup as your project evolves.

What’s really exciting is the self-learning technology built into this system. With an integrated oxygen sensor, the kit monitors your air-fuel ratio and makes real-time adjustments, ensuring optimal fuel mixture. That means more time enjoying a smooth drive and less time fiddling under the hood.

Every cylinder gets its own coil harness, making your engine perform with the modern touch of individually firing coils driven by a crank trigger. For anyone who loves the classic rumble of a small-block or big-block Chevy but wants that sleek, reliable LS-style performance, FiTech’s Ultimate Sync 48X system is the upgrade you didn’t know you needed. It’s all about merging that iconic old-school charm with the best of modern tech.

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