Collection: SCT X4 FORD POWERSTROKE 6.7L (2020–2021) Holiday Blowout SALE

Up to 35% Off SCT X4 Devices, Dieselr Tuning & Select Powerstroke Kits

If you’re tuning a 2020–2021 Ford Powerstroke, the decision isn’t whether to run an SCT X4.
That part was settled years ago.

The only real decision left is whose tuning you trust to control it.

The SCT X4 Holiday Blowout is your window to get proven hardware paired with Dieselr tuning — along with Chaos Custom Tuning and GDP Tuning options — at pricing that doesn’t come around often and doesn’t get extended.

This is not a generic diesel sale.
This is a targeted opportunity for Powerstroke owners who already know better.

Dieselr Tuning — The Standard Others Get Compared To

We lead with Dieselr tuning for a reason.

Our SCT X4 Powerstroke calibrations are built specifically for 2020–2021 Ford diesel trucks, focusing on:

• Controlled, usable power (not dyno spikes)
• Transmission-aware shift strategy
• Clean throttle response
• Consistent drivability under load, towing, and daily use
• This isn’t “mail-order guesswork.”
  This is tuning refined by real trucks, real data, and real expectations.

Most customers don’t come to Dieselr to try tuning.
They come to end the search and this is the BEST tuning on the market.

Chaos Custom Tuning & GDP Tuning — Trusted Alternatives

For customers who already have brand loyalty or specific tuning preferences, we also offer Chaos Custom Tuning and GDP Tuning options during the Holiday Blowout.

Both are established names in the diesel space and fully compatible with the SCT X4 platform for Powerstroke applications. These options exist for informed buyers who know exactly what they’re looking for — not for beginners guessing their way through a build.

Choice is good.
Clarity is better.

SCT X4 Devices & All-In-One Powerstroke Kits on Sale

This collection includes:

• SCT X4 programmers for Ford Powerstroke (2020–2021)
• Dieselr-tuned SCT X4 packages
• Select All-In-One Powerstroke kits
• Supported tuning options from Dieselr, Chaos Custom, and GDP

Everything here is compatible.
Everything here is intentional.
Nothing here is filler.

Why the Holiday Blowout Matters

We don’t discount SCT X4 setups unless it makes sense for our customers — and for us.

The SCT X4 Holiday Blowout exists because serious Powerstroke owners were already planning to tune. This just removes the last excuse to wait.

When it’s over:

• Pricing resets
• Inventory tightens
• And the same setups cost more

That’s not pressure.
That’s reality.

Shop the SCT X4 Holiday Blowout Below

If you already know what an SCT X4 can do —
and you already understand the difference tuning makes —
then you’re exactly who this collection was built for.

Choose your setup.
Choose your tuning.
And get it done right the first time.