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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
Holley EFI Terminator X Stealth 4150 Secondary Throttle Body - Shiny 534-298Secondary Service Throttle Body 4 Injectors Features: Bolt on 2x4 4150 Flange Carburetor Replacement Supports up to 1500 HP Naturally Aspirated or 1250 HP Forced Induction with Eight 100 Lb Hr Injectors Internal 1bar MAP sensor, built into the Terminator X ECU External fuel pressure regulator required, set to a base pressure of 58. 5 PSI, such as Holley part # 12 886 Integrated ignition timing control High Resolution Full Color Touchscreen for Initial
Secondary Service Throttle Body - 4 Injectors
Features:
- Bolt on 2x4 4150 Flange Carburetor Replacement
- Supports up to 1500 HP Naturally Aspirated or 1250 HP Forced Induction with Eight 100 Lb/Hr Injectors
- Internal 1bar MAP sensor, built into the Terminator X ECU
- External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as Holley part # 12-886
- Integrated ignition timing control
- 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!
- The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
- OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service
- Included weld-in O2 sensor bung for the exhaust ensures a leak free oxygen sensor installation
- Plug and play with Holley EFI Accessories, such as the 12.3? and 6.86? Pro Dash; CAN EGT; and Digital Analog style EFI gauges
- Available in 3 finishes: Shiny, Black, and Gold
Specs:
| Adjustable | Yes |
|---|---|
| Brand | Holley EFI |
| Color | Shiny |
| Emission Code | 3 |
| Finish | Shiny |
| Flange Size | 4150 |
| Flange Style | Squarebore |
| Fuel Injectors Included | Yes |
| Fuel System Type | EFI |
| Grade Type | Performance |
| Idle Air Control Motor Included | No |
| Ignition Type | Universal |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Max Horsepower Rating | 650 Naturally Aspirated |
| Mounting Hardware Included | No |
| Product Type | Throttle Body |
| Throttle Body Finish | Polished |
| Throttle Body Material | Cast Aluminum |
| Throttle Body Spacer Included | No |
| Throttle Bore | 1.75 in. |
| Throttle Position Sensor Included | Yes |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 2379 reviews
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Product Reviews
★★★★★ 4
Sturdy
The ball bearings make them roll smooth. I've put plenty of pressure through them and no bending or breaking. The middle sized unit is probably the most useful. The small one has it's uses but can act like a pizza cutter and easily go through sound deadening mats. The large one has a little too much surface area to get a good crush on the mats.
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Reviewed in the United States on August 31, 2025
★★★★★ 5
Works great, good price
Makes installing sound deadening panels a breeze. A little elbow grease required but makes for perfect contact with the sheet metal and butyl.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Well Made Tools!
I have been installing Kilmat in my early 74 Datsun 260Z restoration and these tools are very nice for the price. I like them because they actually have ball bearings and move smoothly over the matting. The size selection is very handy as well and even has some nice finished wooden handles.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Perfect applicators tool
Tool worked great. Bonds sound proofing to metal perfectly.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Must have
These things a freaking AWESOME!
If you're doing a big sound deadner job, you need thees! The 3 different sizes are perfect for the different shapes in the floor pans. Well built, good quality and they have a nice weight to them. Just buy them and thank me later. For $15.00 you can't go wrong.
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Reviewed in the United States on March 12, 2026