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
Pricing by ECU Platform
| ECU / PCM Platform | Typical Applications | Complexity Level | Base Tune Price |
|---|---|---|---|
| 🔧 Cable GM P01 / P59 | 1999–2007 LS (trucks, F-body, swaps) NA |
Low | $199 |
| ⚙️ CAN GM E38 | 2007–2013 LS (cars & trucks) NA E85 |
Medium | $249 |
| 🚀 Boost GM E67 | Performance & boost-capable platforms BOOST E85 |
High | $299 |
| 🔥 Dodge HEMI Platforms | 5.7 / 6.1 / 6.4 / 6.2 (NA, cam, boost) | Review Required | Quote ($299+) |
| ⚡ Ford Coyote / EcoBoost / Modular | Bolt-ons, boosted builds, drivability fixes (platform dependent) | Review Required | Quote ($299+) |
Final pricing confirmed after vehicle information review.
Available LS Tune Packages
How HP Tuners Works
- Read your vehicle: HP Tuners connects to your vehicle’s OBD-II port to read the factory calibration.
- Tune file prepared: Based on your ECU, modifications, and fuel type, a tune file is created or adjusted.
- Flash the tune: The tune is written back to the vehicle using HP Tuners software.
- 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 Pricing
Base Holley Calibration
$299
Naturally aspirated or mild cam setups
Advanced / Boosted Holley Tune
$349+
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.
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
Optional HP Tuners Device Rental
Don’t own HP Tuners? We offer a **temporary HP Tuners device rental** to support remote or pre-made tune customers.
- ✔ Genuine HP Tuners interface
- ✔ Used for reading / flashing tune files only
- ✔ Ideal for pre-made or remote tune support
Rental Cost
$125
7-day rental window
Refundable Deposit
$300
Returned after device is received
Important Rental Terms:
- Device must be returned in original condition
- Customer is responsible for return shipping
- Lost or damaged devices forfeit deposit
- Credits for HP Tuners software are not included unless stated
Rental Agreement Acknowledgment
By requesting an HP Tuners device rental, you acknowledge that the device remains the property of Down Dirty 84 LLC at all times. You agree to use the device only for the approved vehicle and tuning purpose, and to return it in working condition within the stated rental window.
Return-by Date Policy
Rental devices must be shipped back no later than 7 days from delivery. Late returns may result in daily late fees or forfeiture of the refundable deposit. Tracking information is required for all returns.
HP Tuners VIN Lock & Credits Disclaimer
HP Tuners interfaces may require software credits and may VIN-lock to a vehicle when flashing. Unless explicitly included in writing, software credits are not provided. Any VIN locks or credit usage incurred during tuning are the responsibility of the customer.
Rental requests are reviewed and approved before shipping.
Typical Turnaround Time
Most pre-made and file-based requests are delivered within 24–72 business hours after approval, payment, and all required info/files are received. Complex setups (boost/E85, sensor issues, incomplete data) may take longer.
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 review (starts at $299+)
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 review (starts at $299+)
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.
Ford Intake (Remote Tune Approval)
Submit your details for Ford tuning support (Coyote, EcoBoost, Modular, etc.). Compatibility is confirmed before payment.
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.
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, schedule a custom dyno or remote tune.
Book a Custom Tune
© Down Dirty 84 LLC — Custom LS Tuning, Remote & Dyno Services
Built for power, drivability, and reliability.