DOWN DIRTY 84
LLC

LS Pre-Made Performance Tunes

Professionally developed base calibrations for common LS engine combinations. Built for safe power, drivability, and reliability.

⚠️ Not for stock or unknown-condition vehicles

What These Tunes Are (and Aren’t)

✔ What You Get

  • Base calibration for common LS combos
  • Improved drivability and throttle response
  • Safer fueling and ignition tables
  • Reduced torque management (where applicable)

✖ What These Are Not

  • Not a custom tune
  • Not for unknown or unsafe engines
  • No guarantee of maximum horsepower
  • No support without data logs

Choose by ECU Platform

ECU / PCM Platform Typical Applications Complexity Level Current Price / Next Step
🔧 Cable GM P01 / P59 1999–2007 LS (trucks, F-body, swaps)
NA		 Low View current options
⚙️ CAN GM E38 2007–2013 LS (cars & trucks)
NA E85		 Medium View current options
🚀 Boost GM E67 Performance & boost-capable platforms
BOOST E85		 High View current options
🔥 Dodge HEMI Platforms 5.7 / 6.1 / 6.4 / 6.2 (NA, cam, boost) Review Required Quote after review
⚡ Ford Coyote / EcoBoost / Modular Bolt-ons, boosted builds, drivability fixes (platform dependent) Review Required Quote after review

Current products and prices are listed in the DD84 pre-made calibration store. Verify the controller, OS, hardware and delivery path before buying.

Available LS Tune Packages

How HP Tuners Works

  1. Read your vehicle: HP Tuners connects to your vehicle’s OBD-II port to read the factory calibration.
  2. Tune file prepared: Based on your ECU, modifications, and fuel type, a tune file is created or adjusted.
  3. Flash the tune: The tune is written back to the vehicle using HP Tuners software.
  4. Verify & revise (if needed): Data logs may be requested to confirm fueling, spark, and drivability.

Important Notes for New Users

  • HP Tuners does not increase power by itself — the tune file does
  • Some vehicles require software credits to flash
  • Flashing may VIN-lock the device to your vehicle
  • Proper fuel and mechanical condition are required

Holley EFI / ECM Tuning Support

Standalone Holley tuning for LS swaps, race cars, and performance builds. This option is for vehicles running a dedicated Holley ECU — not factory GM computers.

Holley ECUs replace the factory PCM entirely and give full control over fueling, ignition timing, idle strategy, boost control, and safety limits. Because Holley systems rely heavily on correct sensor configuration and wiring, accurate setup information is critical before tuning begins. These systems are commonly used in engine swaps, forced-induction builds, race cars, and vehicles that no longer retain factory electronics.

Supported Holley Systems

  • Terminator X / Terminator X Max — street & swap-focused systems
  • Holley HP — advanced street/strip control
  • Holley Dominator — full motorsports & race applications

Holley Tuning Options

Base Holley Calibration

See current offers

Naturally aspirated or mild cam setups

Advanced / Boosted Holley Tune

See current offers

Boost, E85, or race-oriented configurations

Important Holley Notes

  • Customer must already own a compatible Holley ECU
  • No device rental required for Holley systems
  • Base files may require follow-up revisions
  • Final results depend on accurate sensor data and wiring

Holley EFI Vehicle Intake (Required)

Holley systems require accurate sensor and configuration data. Incomplete or incorrect submissions may be declined.

File Upload (if requested): Upload Holley File
Accepted types: .gcf, .zip • Max size: 25MB

Terminator X vs HP vs Dominator

Holley offers multiple ECU tiers designed for different build levels. Choosing the correct ECU is critical for drivability, expandability, and long‑term support. Below is a practical breakdown to help you select the right system for your vehicle.

Terminator X Holley HP Holley Dominator
Best for street cars, swaps, and weekend performance builds Ideal for serious street/strip and boosted builds Designed for full race and competition vehicles
Limited inputs/outputs and sensor expansion Expanded I/O with greater tuning flexibility Extensive motorsports I/O and control strategies
Cost‑effective and simplified setup Advanced control without full race complexity Unlimited customization for professional teams
Recommended for: NA or mild boost, simple sensor setups Recommended for: Boost, E85, expanded fuel and safety control Recommended for: Race fuel, traction control, advanced fail‑safes

Holley vs HP Tuners – Which Do I Need?

  • Factory GM ECU? → HP Tuners
  • Standalone LS swap or race car? → Holley EFI
  • Need plug-and-play simplicity? → Terminator X
  • Need advanced motorsports control? → Holley HP/Dominator

Holley EFI Disclaimer & Acknowledgment

Holley ECUs are standalone systems that rely entirely on correct sensor configuration. Down Dirty 84 LLC is not responsible for issues caused by incorrect sensor data, wiring errors, or mechanical faults. By proceeding, you acknowledge responsibility for accurate configuration and system installation.

Holley File Upload: Use our secure upload form to send your current Global Folder / tune file as requested: Upload Holley File
Accepted types: .gcf, .zip • Max size: 25MB

Revision Request (File Upload)

Use this when you already have a file from us and need a revision based on new logs, hardware changes, or drivability concerns.

  • Include your name + email used at purchase
  • Describe the issue clearly (idle, cold start, tip-in, WOT, etc.)
  • Upload the latest tune file and data logs

Revision Upload: Open Revision Upload Form
Accepted types: .hpt, .gcf, .zip • Max size: 25MB

Need an HP Tuners interface?

For approved stock-ECM applications, DD84 may offer a loaner path. Availability, deposit, rental period, shipping, credits, specialty cables and return terms are set out on the current product listing and confirmed before an order is accepted.

Check current loaner options and terms. If you are unsure whether your controller qualifies, start with the compatibility review.

File delivery timing depends on controller access, vehicle readiness and receipt of all required information. DD84 confirms the expected timeline for the selected service.

Start Here

Choose your system so we can route you to the correct intake and file upload.

Dodge + Ford Tuning Options

Need tuning support beyond GM LS platforms? We also offer custom remote tuning for select Dodge/Chrysler and Ford platforms. Support varies by ECU, year, and available tuning device — submit your info and we’ll confirm compatibility before payment.

🔥 Dodge / Chrysler (HEMI)

  • Common builds: street HEMI, cam packages, headers, boost
  • Fuel: pump gas / flex fuel where supported
  • What you’ll get: drivability-focused calibration + power/safety adjustments

Pricing: Quote after vehicle and controller review
Approval required: ECU access + device availability must be confirmed.

⚡ Ford (Coyote / EcoBoost / Modular)

  • Common builds: bolt-ons, boosted setups, drivability fixes
  • Fuel: pump gas / E85 where supported
  • What you’ll get: safe power gains + reliability-focused limits

Pricing: Quote after vehicle and controller review
Approval required: ECU access + device availability must be confirmed.

Dodge/Ford Disqualification Checklist

To protect your engine and keep results consistent, we may decline requests that match any of the following:

  • Unknown engine condition, misfires, check-engine lights, or unresolved mechanical issues
  • Fuel system not sized for your power goal (especially boost/E85)
  • Unsafe boost setup (no wideband/monitoring, no proper MAP/MAF configuration)
  • Unknown injector data / incorrect injector characterization
  • Customer cannot provide current tune file and/or data logs if requested
  • Unsupported ECU/tooling for your year/model

Dodge / Chrysler Intake (Remote Tune Approval)

Submit your details for Dodge/Chrysler HEMI tuning support. Compatibility is confirmed before payment.





File Upload (if requested): Upload Tune File
Accepted types: .zip (logs/files) • Max size: 25MB

Ford Intake (Remote Tune Approval)

Submit your details for Ford tuning support (Coyote, EcoBoost, Modular, etc.). Compatibility is confirmed before payment.





File Upload (if requested): Upload Tune File
Accepted types: .zip (logs/files) • Max size: 25MB

GM ECU (HP Tuners) Pre-Purchase Vehicle Information

This information is required before purchasing a pre-made tune. Submissions that do not meet requirements may be declined.

Required Vehicle Details (Must Be Completed)






File Upload (recommended): If you need to send a stock read/current tune for revisions, use our secure upload form: Upload Tune File
Accepted types: .hpt, .zip (logs/files) • Max size: 25MB • Do not send executable files.

Tune purchase links will be provided after review and approval.

Tune File Delivery & Exchange Options

Tune files can be sent to you or sent to us, depending on your setup and tuning method.

📧 Receive Tune File

  • Email delivery or secure download link
  • Vehicle-specific calibration file
  • Basic flashing instructions included

📤 Send Us Your File

  • Upload your stock or current tune file
  • Required for revisions or file-based tuning
  • Accepted formats: HP Tuners (.hpt), Holley (.gcf)

🛠️ Assisted Flashing (Optional)

  • Live or scheduled flashing guidance
  • Recommended for first-time users
  • Compatible tuning device required

File Handling Policy: All tune files are vehicle-specific. Files provided by the customer are used only for the approved vehicle and are not shared, reused, or redistributed.

Want Maximum Results?

These base tunes are a starting point. For best performance, safety, and drivability, request a custom remote or in-person tune for a supported application.

Book a Custom Tune
DOWN DIRTY 84
LLC

© Down Dirty 84 LLC — Custom Calibration, Diagnostics & Fabrication
Built for power, drivability, and reliability.