LLY Duramax DSP5 SOTF EFI Live Tuning (2004.5–2005)
Custom In-House Multi-Tune Calibration by Piston Twistin
This product is for customers who want five custom EFI Live tunes in one file, selectable on-the-fly using a DSP5 switch, for the 2004.5–2005 LLY Duramax.
Each DSP5 position is fully custom-calibrated in-house for your exact setup — any turbo, any injectors, any CP3 — with unlimited revisions included and no hourly support fees.
This is a tune-file-only product and requires that you already own an EFI Live device.
🔒 IMPORTANT — PLEASE READ BEFORE PURCHASING
-
✅ DSP5 / Switch-On-The-Fly (SOTF) EFI Live tuning
-
✅ 5 custom power levels in one file
-
✅ Requires an EFI Live AutoCal or FlashScan (any generation)
-
✅ Requires a DSP5 switch installed on the truck
-
❌ EFI Live device not included
-
❌ DSP5 switch not included
👉 If you do not own an EFI Live device or DSP5 switch, please select one of our complete LLY tuning kits instead.
What Is DSP5 / Switch-On-The-Fly?
DSP5 allows you to change power levels while driving using a dash-mounted rotary switch.
No reflashing.
No laptop.
No downtime.
One truck — five different calibrations instantly available.
Why Piston Twistin DSP5 Tuning Is Different
At Piston Twistin, DSP5 tuning is not stacked or scaled power levels.
Each DSP5 position is:
-
Individually calibrated
-
Built for a specific purpose
-
Refined using datalog feedback
-
Revised as your setup changes
Many tuning companies charge extra for:
-
Additional power levels
-
Larger turbos
-
Bigger injectors
-
Stroker CP3s
-
Hourly tuning support
We don’t do that.
✅ Our DSP5 Pricing Philosophy
Your truck evolves.
Your tuning support should evolve with it.
🔧 What You’re Getting
✅ Five Fully Custom EFI Live Tunes (DSP5)
Each DSP5 slot is custom-built in-house and tailored to:
-
Your hardware
-
Your driving style
-
Your towing needs
-
Your performance goals
We start with a proven base calibration, then use datalog feedback to fine-tune fueling, timing, torque management, and drivability specifically for your LLY Duramax.
🎛️ DSP5 Power Level Layout (Typical Example)
Your DSP5 order can be customized, but a common setup looks like:
DSP5 Position 1 – Stock / Economy
+15–25 RWHP
Clean daily driving, maximum longevity, best MPG.
DSP5 Position 2 – Light Tow
+40–60 RWHP
Ideal for towing under ~10,000 lbs with controlled EGTs.
DSP5 Position 3 – Heavy Tow
+60–80 RWHP
Designed for heavier loads (10,000–15,000+ lbs).
Strong mid-range torque with safe heat management.
DSP5 Position 4 – Street Performance
+80–110 RWHP
Responsive throttle and strong acceleration while remaining daily-friendly.
DSP5 Position 5 – Performance / Race
+120–200+ RWHP (mod-dependent)
Maximum power for built trucks and aggressive setups.
Power gains vary based on turbo size, injectors, CP3, and supporting modifications.
⚙️ How the Process Works
1️⃣ Place Your Order
This product delivers one DSP5 EFI Live tune file with five power levels.
2️⃣ Submit Vehicle Information
You’ll receive a secure form to provide:
-
Year & model
-
Full modification list
-
Turbo / injector / CP3 setup
-
Intended use (daily, tow, street, race)
3️⃣ Custom DSP5 Development
1–2 Business Days Guaranteed
Your DSP5 file is built specifically for your truck — not a generic tune pack.
Your stock factory calibration is included at no extra charge.
4️⃣ Tune Delivery
Highly modified trucks may require datalogging for final optimization.
❓ Frequently Asked Questions
Do I need a DSP5 switch?
Yes.
A physical DSP5 switch must be installed to use multiple power levels.
Can I change the DSP5 power level order later?
Yes.
Re-ordering and revisions are included.
Do you charge for revisions?
No.
All DSP5 revisions are included — no hourly fees.
Do you charge extra for aftermarket hardware?
No.
Any turbo, injectors, or CP3 are supported at no additional cost.
📦 What’s Included
-
1x Custom DSP5 EFI Live Tune File (5 Power Levels)
-
Built 100% In-House by Piston Twistin
-
Unlimited Revisions for Future Changes
-
Ongoing Support — No Hourly Rates
🔥 Order With Confidence
If you want maximum flexibility, real tuning support, and the ability to adapt your LLY Duramax to any situation — DSP5 is the move.
📩 Questions? Email us anytime at Support@PistonTwistin.org
🚨 OFF-ROAD USE ONLY — IMPORTANT NOTICE
This product includes off-road use calibration and is intended for vehicles that are not operated on public roadways.
✔️ EGR delete support
✔️ DPF delete support
✔️ Off-road exhaust configurations supported
✔️ Proper diagnostic logic handling
By purchasing this product, you acknowledge that your vehicle is used in an off-road, competition, or closed-course environment and that compliance with all applicable laws is the responsibility of the vehicle owner.
