🌍 We Ship Worldwide Learn more

💵 Afterpay available, shop now, pay later Learn more

💬 Customer Support Click here

DiabloSport  |  SKU: 8266-R

DiabloSport inTune 3 for 2020-2023 6.6 L8T Unlock and Tune Kit - 8266-R

Unlock AND Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with inTune 3!

Regular price $1,580.60 NZD + GST
Shipping calculated at checkout.
⚠ Special Order Item — ships direct from supplier. No returns, exchanges, or cancellations once processed. Please allow 7–20 days shipping.

Description

Unlock AND Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with inTune 3!

Part Number: 8266-R

The DiabloSport inTune i3 8266-R Kit is the breakthrough tuning solution for 2020–2023 GM trucks equipped with the 6.6L L8T gas engine. These trucks shipped with locked PCMs that blocked tuning—until now. This complete kit includes the powerful inTune i3 handheld tuner, along with DiabloSport’s exclusive locksmith device and harnesses required to unlock your ECM.

Features and Benefits

• 2020-2023 Silverado 2500/3500 6.6 L8T
• 2020-2023 Sierra 2500/3500 6.6 L8T
• 28 rwhp over stock on premium fuel
• 50 rwtq over stock on premium fuel
• Tunes for 87 octane, and premium fuel provided
• ECM unlock included!
• Unlock and Tune, at home!
• Preloaded tunes for multiple octane levels
• Support for 6.6L L8T applications with 6 speed Transmission
• Throttle Boost setting for adjustable throttle feel
• Adjust speedometer for larger tires (26"-38")
• Calibrate speedometer for gear change (3.42-5.13)
• Remove speed limiter for increased top speed
• Adjust engine rev limiter for increased RPM range (+/- 400 RPM)
• Adjust engine idle speed in Park/Neutral and Drive
• ‘Keep Drive Mode Setting’ allows you to select a drive mode and it will remember that mode next time you start the truck!
• Adjust fueling at WOT in multiple RPM ranges
• Calibrate spark timing at WOT across multiple RPM ranges
• Front/Rear TPMS threshold adjustment
• Air Filter Monitor system control
• Transmissions adaptive relearn

Specifications

  • Specifications
    5 Volt Data Logging InputsYes
    50 State LegalNo
    AC AdapterNo
    Accepts Custom Tunes From CMRYes
    Body MaterialABS
    BrandDiabloSport
    California Proposition 65 RequiredYes
    CARB (California) CompliantNo
    Case IncludedNo
    CategoryTuners and Programmers
    Color DisplayYes
    Color Touch Screen DisplayYes
    Custom TuningYes
    Data LoggingYes
    Emission Code7
    Erases Fault CodeYes
    Fuel TypeGasoline
    Grade TypeRegular
    Grade TypePerformance
    In Cab MonitoringNo
    Instruction Manual IncludedYes
    part typeComputer Chip Programmer
    Performance TunesYes
    Personal Computer and Mac CompatibleYes
    Product TypeHandheld Tuner
    Software IncludedYes
    SpeedometerYes
    Sub CategoryEngine Service
    Systems CoveredTransmission
    Systems CoveredEngine
    UpgradableYes
    Video CapableNo
    WarningCalifornia Proposition 65
    Wi-Fi UpdatesYes
  • Instructions

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.