SKU: 38437446861

Stage 1 LLY Duramax Delete Kit (2004.5–2005) | EGR Competition Use Kit

Sale price$607.50 Regular price$675.00
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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

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Description

Stage 1 LLY Duramax Delete Kit (2004.5–2005) | EGR Competition Use KitLLY Duramax EFI Live Tuning Kit Complete Custom DSP5 Solution Built by PistonTwistin 2004. 52005 Duramax Take your LLY Duramax to the next level with our all in one EFI Live tuning kitdesigned to deliver maximum performance, improved drivability, and dependable towing power. Whether you're daily driving, towing heavy, or chasing horsepower, this plug and play custom tuning solution is built around your trucks exact needs. Why Choose PistonTwistin

LLY Duramax EFI Live Tuning Kit – Complete Custom DSP5 Solution

Built by PistonTwistin | 2004.5–2005 Duramax

Take your LLY Duramax to the next level with our all-in-one EFI Live tuning kit—designed to deliver maximum performance, improved drivability, and dependable towing power. Whether you're daily driving, towing heavy, or chasing horsepower, this plug-and-play custom tuning solution is built around your truck’s exact needs.


🔧 Why Choose PistonTwistin Custom Tuning?

Precision-Built EFI Live Calibration

Every tune is built from the ground up based on your truck’s modifications, usage, and goals. No canned or reused files.

Power On Demand

Experience faster throttle response, reduced turbo lag, and instant torque—exactly when you need it.

Fuel Economy Gains

Properly tuned power increases engine efficiency. Higher horsepower often means better MPG under conservative driving.

🚛 Serious Towing Confidence

Confidently haul loads over 15,000 lbs or dominate in sled pulls—we’ll tune you accordingly.

🎛️ Switch-On-The-Fly DSP5 Control

Switch between five custom power levels using your DSP5 knob. We can fully customize tune order and power output to match your driving habits.

🔄 Reversible & Safe

No permanent changes to your ECU—return to stock power at any time if needed.


⚙️ How It Works

  1. Place Your Order
    Choose between AutoCal V3, email delivery, or bench flashing.

  2. Submit Vehicle Details
    You’ll receive a secure digital form to provide info on your LLY’s year, mods, and intended use.

  3. Custom Tune Creation
    Our experienced calibration team builds your tune (1–3 business days) and verifies it against your setup.

  4. Tune Delivery Options

  • AutoCal V3: Ships pre-loaded, plug-and-play

  • Email Delivery: For customers with existing EFI Live devices

  • Bench Flashing: Mail us your ECM/TCM—we flash it and return it fast

Note: Highly modified setups may require datalogging for precision tuning.


📊 Power Levels & Use Case Guide

Mode RWHP Gain Best For
Stock Optimized +20 HP Clean daily driving
Heavy Tow +40 HP 15,000+ lbs hauling
Light Tow +60 HP Towing under 15,000 lbs
Street Performance +100 HP Daily use & responsive driving
Sport / Max Effort +120–200 HP Built trucks / racing

All five DSP5 tune levels can be tailored to your mods (intake, exhaust, injectors, CP3 conversion, etc.) and truck goals.


🔩 Recommended Performance Upgrades

Stage 1 Cold Air Intake

HSP Diesel 4" Cold Air Intake Bundle – 081-HSP

  • Increases airflow and throttle response

  • Faster turbo spool

  • Custom powder coat finish

  • 📦 Ships in 5–10 business days (custom colors: 15–20 days)


Exhaust Options

  • 4” MBRP Straight Pipe: Enhanced turbo whistle

  • 5” MBRP Straight Pipe: Deep, aggressive tone

  • Wehrli 3” Downpipe: Ceramic-coated, heat-wrapped, bolt-on upgrade


Common Questions

Is professional installation required?
No. AutoCal installs in under 10 minutes—no tools needed.

Can I use this on other Duramax models?
Yes. We support all Duramax generations, along with Cummins !

What is bench flashing?
For customers without a device or with locked ECMs, we offer professional bench flashing. Just send in your ECM/TCM—we’ll handle the rest.

What’s the benefit of better fuel filtration?
Protects your injectors and enhances long-term performance. Strongly recommended for tuned trucks.


Included With Your Order

  • 5x Custom DSP5 Tune Files

  • Fully personalized EFI Live tuning

  • Optional AutoCal V3 (pre-loaded, plug-and-play)

  • Lifetime support and retunes for future upgrades

  • Stock power reversion available anytime


🚀 Unlock Your LLY’s Full Potential

Join hundreds of LLY owners who trust PistonTwistin for proven performance, reliability, and long-term support. Whether you're hauling, racing, or commuting, our tuning gives you control and confidence behind the wheel.

📩 Have questions? Reach us at [email protected]

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 38437446861

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Nicole S.
Fort Morgan, US
★★★★★ 3
Missing items
Color: Sky Blue, Size: 16
Was missing the tie that is supposed to come with it and it looked like it was tried on and thrown back in the bag. The sleeve to the jacket were rolled up.
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Reviewed in the United States on December 7, 2025
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Alley Cat on a Homestead
Belleville, US
★★★★★ 5
Excellent Quality, Great Value, Great Look. Highly Recommend
Very well-made, there are some minor imperfections in the cuff sewing that aren't really noticeable when on. Liner is quality, color is spot on, and it fits true to size. If you're in the market for a toddler blazer and pants, you can't go wrong with this one in terms of quality, price, and the cut is perfect for a very polished look. There were a few loose strings to be clipped, but everything was correctly sewn and well. None of them affected the seam strength. The pants have a button and elastic on the waistband to make adjusting the waist size easier.
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Reviewed in the United States on November 14, 2025
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Amazon Customer
Dallas, US
★★★★★ 5
Great boys slim fit suit for weddings, church, or special events
Color: Medium Grey, Size: 12
Great kids suit. Comes with a jacket, pants, and tie. Does not have a shirt. Fits as expected. Classic cut on the lapels. Great quality materials. Well made pants and jacket. The color is consistent without any fade or dark spots that can happen with lower quality fabrics. Looks great on. My son loves it. Says it is not restrictive, he can move easily in it. Highly recommend for church, special events, weddings, etc.
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Reviewed in the United States on October 22, 2025
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Mommynificent
Grantham, US
★★★★★ 5
Nice high-quality, light weight suit for a tween!
Color: Navy Blue, Size: 10
This is such an attractive suit for a tween boy! My son loves dressing up, and this is his new favorite suit. He really likes the double-breasted style and the light weight of the fabric so that it isn't too hot. The tie that came with it gives major Harry Potter vibes which we weren't expecting, but he has lots of other ties that he also enjoys pairing with it. The size seems right, and it fits him well. He says it is very comfortable. I'm happy with the quality and the navy color.
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Reviewed in the United States on October 14, 2025
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A. Beauto
Battle Creek, US
★★★★★ 5
Stylish and great value!
Color: Medium Grey, Size: 14
This grey suit was a great find for a school ceremony and will definitely be used again. The neutral color makes it easy to pair with different shirts and ties, and it has a modern, clean-cut look. The jacket and pants fit nicely after a quick press, and the quality was better than I expected for the price. It lost a star only because the waist on the pants needed a slight adjustment, but overall, we’re very happy with it!
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Reviewed in the United States on October 10, 2025

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