Time to Retire Your Siemens Deka 250s
Meet the AFIS 250 lb/hr Injector – The Modern Replacement You’ve Been Waiting For
For years, the Siemens Deka 250 lb/hr injector has been the go-to for big horsepower builds. Drag cars, street cars, methanol, E85—you name it, they’ve been there. But let’s be honest… time has caught up with them.
If you’re still running Dekas, chances are you’ve dealt with some (or all) of the following:
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Inconsistent idle
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Poor low-pulse control
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Cylinder-to-cylinder variation
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Limited data for modern ECUs
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Used, reconditioned, or questionable “new” stock
Sound familiar? Yeah, we’ve been there too.
That’s exactly why Prime Speedworks now offers the AFIS 250 lb/hr fuel injector—a true, modern replacement for the aging Siemens Deka platform.
Why AFIS 250 lb/hr?
AFIS injectors aren’t a rebadged relic. They’re a clean-sheet, motorsport-focused injector designed for today’s fuels, today’s ECUs, and today’s power levels.
Key Advantages Over Siemens Deka:
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Superior low-pulse width control – smoother idle and better drivability
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Excellent linearity across the entire operating range
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Matched sets for consistent cylinder fueling
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Modern data support for popular ECUs
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Designed for E85, methanol, and race fuel
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New production – not reworked old cores
In short: same flow capability, far better behaviour.
Big Power Without the Compromises
The AFIS 250 lb/hr injectors are ideal for:
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High-horsepower drag builds
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Turbo and supercharged engines
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Alcohol and ethanol-based fuel systems
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Applications where idle quality and control actually matter
Whether you’re chasing four-digit power numbers or just want a car that doesn’t load up, surge, or fight the tuner, these injectors deliver.
A Straightforward Upgrade
Running Siemens Deka 250s now? The AFIS 250 lb/hr injectors are the logical next step. Same flow class, massively improved performance, and backed by real-world motorsport development—not legacy reputation.
At Prime Speedworks, we don’t push parts that create problems. We push parts that solve them.
Ready to Upgrade?
If you’re done fighting old injector tech and want a fuel system component that works with your engine, ECU, and tuner—not against them—AFIS 250 lb/hr injectors are the answer.
👉 Available now at Prime Speedworks
👉 Backed by real support from people who race, tune, and build
Stop compensating for outdated injectors. Upgrade once. Do it properly.
