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Description
Holley EFI Terminator X Stealth 4150 Secondary Throttle Body - Gold 534-300Secondary 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 | Gold |
| Emission Code | 3 |
| Finish | Gold |
| 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 | Classic Gold |
| 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
4.1 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Really comfortable, good fit
Size: 6X-Large, Color: 5 Pack(black,black,blue,blue,light Coffee)
These are very lightweight and comfortable. The material stretches freely and doesn't bind up anywhere. If you go by the size guide, they should fit perfectly neither too loose nor too tight. Would definitely recommend.
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Reviewed in the United States on April 23, 2026
★★★★★ 3
These don't work for me...
Size: Medium, Color: B005
First the good... I like the material; it's very soft, light, and stretchy. I also like the colors, but that's all I like about these boyshort panties. My main goal for panties is to have them NOT ride up into my butt crack leaving the bottoms of my butt hanging out. It's probably comfortable for some, but it drives me nuts to feel this constant need to pull them out of my butt crack and down over my butt cheeks. If I wanted my butt hanging out I'd buy thongs, LOL. The part I really don't understand, is why they make the front and the back the same width/length. I mean clearly more material would be needed in the back to fit around two round humps, right? I mean I guess unless you have what I call a pancake butt, I don't see why there shouldn't be more material on the backside of the underwear. Why is it so dang difficult to find underwear in this style to fit up over butt cheeks? If I pull them down enough to cover the bottoms of my cheeks then the waistband is sitting right at the top of my crack which is extremely annoying (then I feel this constant need to pull them up!) especially when the front is long enough to go up to my belly button!! Who are they making these underwear for??? Ladies with FLAT butts apparently. For reference, I'm 5'5" 130 lbs, hips 37", waist 27", athletic build, as in lean but with muscular glutes & quads from speed skating. Not only are they not made big enough to go up over my rump while still keeping my cheek bottoms from hanging out, but they're too long in the front cause they constantly roll up in the front. I've even tried turning them around, even though they seem to be exactly the same front to back, and they fit exactly the same, no surprise there. I may just be out of luck finding comfy boyshort panties that actually fit the way I want them to. :/
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Super comfy!
Great colors, super comfy, soft and druable!!
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Comfy and well made
Size: Large, Color: B2207sp
Love these! They stay in place, are soft and comfortable with just enough stretch but hold their shape. This is my 3rd order.
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025