PREORDER & SAVE! PDI Big Boss Tuner for 2024-2026 Cummins X15
Introducing the PDI Big Boss Performance Tuner for 2024–2026 Cummins X15 EPA24. Pre-Order Now & Save $200
If you're running a 2024 or newer Cummins X15, you've probably been waiting for a tuning solution that's built specifically for EPA24 engines. That wait is over. PDI — Performance Diesel Inc. — has developed the Big Boss Performance Tuner X15 EPA24, and we're excited to offer it here at Parley's Diesel Performance.
It ships mid-August 2026, and right now you can pre-order and lock in a $200 savings off the regular price of $2,350. Pre-order price: $2,150.
Pre-Order & Save
$200 OFF
Ships Mid-August 2026
What Is the PDI Big Boss Tuner?
The Big Boss Tuner is PDI's all-in-one performance and diagnostic tool for big rig and diesel motorhome owners. It puts engine and transmission-safe performance programming into an easy-to-use handheld device, no dealer visit required, no laptops, no complicated wiring. If you have a WiFi signal, you can install it.
Beyond the performance gains, the tuner gives you real access to what's happening inside your engine. Read and clear diagnostic trouble codes, monitor live vehicle parameters, manage your DPF, and keep everything current with automatic WiFi updates. It's a command center for your X15.
Powered by PDI — Performance Diesel Inc.Trusted performance tuning built for big rigs and diesel motorhomes.
Two Tune Options — Pick What Fits Your Run
The Big Boss Tuner comes with two performance tune levels so you can dial in exactly what you need:
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+10% Economy Tune — Optimized for fuel savings on long hauls. If your bottom line lives and dies on fuel costs, this is your tune.
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+15% Power Tune — More pull, faster response, better passing power. Feel the difference from the first mile.
Both tunes are fully emissions legal in all 50 states and come with a CARB Executive Order (E.O.) — so you get the performance without the compliance headaches.
Full Feature List
Here's everything the PDI Big Boss Tuner X15 EPA24 brings to the table:
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Tunes 2024–2026 Cummins X15 EPA24 engines
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Two added power levels — +10% Economy Tune and +15% Power Tune
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Read and clear Diagnostic Trouble Codes (DTCs)
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WiFi installation — all you need is a wireless internet signal
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Display multiple vehicle operating parameters with the Big Boss Monitor
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Emissions legal in all 50 states — comes with CARB E.O.
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Automatic WiFi updates keep your tunes and features current
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DPF management with restriction test and manual regeneration
Free Magnetic Mount
Order through Parley's Diesel and we'll include the PDI Big Boss Magnetic Mount at no charge — a $50 value, exclusive to us. The magnetic mount lets you place the tuner anywhere in your cab with a super-strong hold, and it's designed for quick mounting and release. You won't get this free with any other dealer.
Fitment
The PDI Big Boss Tuner X15 EPA24 fits the following:
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2024–2026 Cummins X15 EPA24 — NN ECM Code
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Part Number 131008341939 — 9-Pin EPA24
Important: Please include your engine serial number when placing your order so we can verify your Cummins KW or NN ECM code before we ship.
Ships mid-August 2026. Pre-order pricing ends when stock arrives.
Lock in your $200 savings — and get the free magnetic mount exclusive to Parley's.
Pre-Order Now — Save $200Questions? Call or text us at 1-801-938-4891 — we'll confirm fitment before you order.
Posted on: June 15, 2026
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