Optional Add-On: Coil Brackets – available for a clean, secure mounting solution.
INTRODUCING: LT-DIS
MODERN IGNITION. CLASSIC POWER.
Say goodbye to the Opti-spark for good!
Bolt-on. Plug and Play. Packed with intelligence.
Years in the making. This is the most advanced LT1 ignition upgrade ever made. It has exceeded all expectations.
FEATURES
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LT1/LT4/L99 Compatible
(1992–1997) -
System Info &
Diagnostic App -
Distributorless
Coil-per-plug
Conversion -
PC Logic Anlayzer
Software -
Works with Factory
LT1 PCM -
In Field Firmware
Updates -
24x/1x LS Based Crank & Cam Signals
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Emission Compliant
US 49 State, CARB - TBD
smarter ignition starts here.
Monitor. Diagnose. Update. All From Your Garage
Built-in Diagnostics – Instantly monitor system health from your phone
PC Based logic analyzer – For advanced signal analysis and troubleshooting.
No Special Tools or Software Required – If you’ve got a phone, you’ve got control
“This system completely changed how my LT1 runs”
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SIMPLICITY
No wiring hacks. No timing cover removal.
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PERFORMANCE
High-energy spark. Coil-per-plug precision.
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RELIABILITY
No more Opti failures. No more guesswork.
in the box.
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LT-DIS Sensing Unit
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Main Wiring Harness
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Power Module with extension harness
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Dash Module (Bluetooth, In-Field Programmer, and Logic Analyzer)
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Programming wiring harness
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Keyed Crank Hub with integrated crank reluctor.
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Cam Sensor
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Crank Sensor with shims & alignment tool
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Hub Spacer
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Crank sensor air gap yellow shim gauge (0.020”)
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Water pump gaskets
platform-perfect fit
BUILT FOR THE LT1 YOU DRIVE
Whether your restoring a classic Impala SS, building a street scorching Camaro, or a competitive road racing Corvette, The LT-DIS system is perfectly engineered to integrate seamlessly with the vehicles that made the LT1/LT4 engines legendary
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1994–1996 B-Body
Chevrolet Impala SS
Buick Roadmaster
Chevrolet Caprice
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1993–1997 F-Body
Chevrolet Camaro
Pontiac Firebird
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1992–1996 Y-Body
Chevrolet Corvette
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1994–1996 D-Body
Cadillac Fleetwood
FAQ
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Does the LT-DIS completely replace the Optispark?
Yes. The LT-DIS is a true distributorless ignition system. It fully deletes the Optispark, ICM, and single coil that came factory on the LT1/LT4/L99 engines, replacing them with modern coil-per-plug ignition and LS-style 24x/1x crank and cam signals. All while working with factory PCM!
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Does the LT-DIS work with the factory LT1 PCM?
Yes. The system was designed to work in harmony with your stock LT1 PCM (1992/1993, 1994–1997). No PCM tuning or replacement is required to install and operate the LT-DIS. The system converts the reliable 24x/1x LS based crank and cam signal into hi/lo resolution signals (originally produced by Optispark) that the factory PCM expects. The LT-DIS system then fires the appropriate coil based on the factory PCM ignition pulse signal
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Can I update or upgrade the system later?
Yes. LT-DIS supports in-field firmware updates for feature enhancements, performance improvements, and potential bug fixes. Also conveniently, since the main crank and cam sensors are 24x/1x LS based and coil packs are also installed, it also offers an upgrade path to LS PCM or aftermarket ECUs if you decide to go further in the future with racing and aftermarket PCM support.
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Does the LT-DIS require eight coils, coil brackets and new spark plug wires?
Yes. The base LT-DIS kit (spline or pin drive) is very complete but it does not come with the needed eight coils, coil brackets and plug wires. These need to be supplied seperately. Torqhead offers full coil bracket assembly kits to pair with the LT-DIS system, or enthusiasts can create their own setups from used/new coils. To each their own.
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Is this emissions legal?
49 State Legal for 2025 (SC-E in progress)
CARB Certification planned for ~late 2026
(Always check your local/state regulations.)
LT-DIS vs. optispark
LT-DIS
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Coil-Per-Plug Ignition
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Modern hall effect Crank/Cam sensors
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Built-In Diagnostic App
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Completely sealed and waterpoof
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Optispark Delete
OPTISPARK
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Single Ignition Coil
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Inadequate "optical" sensor
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Brain Dead
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Corrosion, moisture ingress issues
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Prone to Failure
Pre-Order the LT-DIS
“This is going to completely change the LT1 Market”
Product launch discounts!!
-
Level 1-SOLD OUT
$180 OFF
⚡ Exclusive 'super early bird' pricing.
⚡ Just 40 units available.
⚡ Save $180 instantly.
Sold out.
-
Level 2
$135 OFF
⚡ Next wave 'early bird' pre-orders.
⚡ 60 units available.
⚡ Save $135 before it’s gone.
-
Level 3
$90 OFF
⚡ Final pre-order chance.
⚡ 80 units available.
⚡ Save $90 before launch.
After this, full price only.
Approximate Lead Time 6- 8 Weeks from end of pre-order phase.
Units will start shipping March 2026