EFI Terminator X Stealth GM LS 4150 - Shiny - 24X Crank - 4 Injectors - 650 HP
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EFI Terminator X Stealth GM LS 4150 - Shiny - 24X Crank - 4 Injectors - 650 HP
Pre-2009 GM 4L60E/4L80E Transmission Control - 1250 HP
Overview
The Terminator X Stealth 4150 1250HP EFI system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 1250 HP on forced induction applications. The Terminator X ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications? Terminator X Max Stealth 4150 kits provide transmission control for Pre-2009 GM 4L60E/4L80E Transmissions (Part numbers 550-1014, 550-1015, 550-1016)
Not recommended for 4x4 applications with electronic transfer cases. Not compatible with 4L6X transmissions from model year 1995 or before due to year-by-year changes in converter lockup and downshift strategy.
Features:
- Terminator X Stealth 4150 Kits for either 24x or 58x LS engines
- Supports up to 650HP with Four 100lb./hr. Injectors
- Terminator X Max kits provide plug and play Transmission control for GM Transmissions
- Internal 1bar MAP sensor, built into the Terminator X ECU.
- All of the wiring exits below the fuel injector bowls, for a completely stealth installation
- Air entry machined to fit most stock style air cleaners with air cleaner locator provisions
- External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886
- Integrated ignition timing control ????????"Plug and play with factory LS coil sub harness and OEM LS coils ????????" no external boxes/modules needed to run Coil Near Plug
- High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
- Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
- Self-tuning ECU means you don??????????????t have to be a computer/tuning wiz to have EFI!
- 4 Inputs ????????" 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
- 4 Outputs ????????" Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
- OEM Style TPS/IAC, for years of dependable service
- Available in 3 finishes: Shiny, Black and Gold
- Compatible with Holley EFI digital dashes, gauges and fuel system accessories
Details:
- Color: Shiny
- Ignition Type: GM LS 24x
- Injector Size: 100 lb/hr @ 58.5 PSI
- Max Horsepower Rating: 650 Naturally Aspirated
- Terminator LS Options: Fuel, Spark
Links
Instruction Sheet
Parts Guide
Addendum
Shipping
Shipping
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Out of stock items are shipped as soon as they're available. Many items are built to order. Those items will have an average lead time on the product page.
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Returns
Returns
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- 30-day return policy, which means you have 30 days after receiving your item to request a return.
- In unused and resellable items, or defective items.
- In the original packaging with all the tags intact.
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- Digital Items like Tuning Credits for HP Tuners
- Gift cards.
- Discounted items (if applicable).
Damage, loss, or theft issues
- If the purchased product is faulty, reach out to us within 7 days of the delivered date.
- If the purchased product is loss, or theft, Please collect evidence and contact us immediately.
Refund solutions
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Refund policy
The Tuner Store accepts returns on new products within 30 days from the date of delivery. Items must be received in their original packaging material and in a new status. Used products or customer damaged products will not be accepted.
The Tuner Store reserves the right to apply a restocking fee to all returns. The purpose of this fee is to recover operational costs related to the purchase and the customer changing their mind.
When returns are the result of the manufacturer defect as determined by The Tuner Store, the return will not be subject to the above restocking fee.
How soon will I get my refund?
- After your return has been processed, you will receive a refund notice from us and it will take an additional 1-3 business days for the refund to be returned to your original payment method. The refund to the store credit is immediate.
- If more than 5 business days have passed since we’ve approved your return, please contact us at service@tunerstore.com.
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Some oversized, heavy, or specialty items may incur additional shipping charges based on your delivery location. If this applies to your order, our team will contact you after checkout with the updated cost. Orders will not ship until additional charges are confirmed and paid.

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