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Description
Holley Sniper Stealth 4150 - BlackHolley Sniper Stealth 4150 Black Supports Up To 650HP 3. 5 in. Handheld Monitor Carburetor Styling Return Fuel System Overview Holley's Sniper Stealth 4150 Master Kit gives you carburetor styling but functions just like the Sniper! A 4150 stealth is a great way to upgrade your ride to fuel injection in a cost efficient way with just 4 simple connections required. Take your build to the next level and take advantage of improved engine performance,
Holley Sniper Stealth 4150 - BlackSupports Up To 650HP - 3.5 in. Handheld Monitor - Carburetor Styling - Return Fuel System
Overview
Holley's Sniper Stealth 4150 Master Kit gives you carburetor styling but functions just like the Sniper! A 4150 stealth is a great way to upgrade your ride to fuel injection in a cost-efficient way with just 4 simple connections required. Take your build to the next level and take advantage of improved engine performance, better MPG's and easier starting. This kit supports up to 650hp naturally aspirated and 600hp boosted with Four 100 Lb/Hr injectors! You don't have to be a computer wiz or tuning professional to run a sniper kit on your build. Simplicity is what we strive for! Our calibration wizard allows you to just answer a few questions about your engine and the system will begin self-tuning with no laptop required. Use the high resolution 3.5" full color touchscreen for tuning and gauge displays. The stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications. The 4150 includes a complete fuel system consisting of all necessary hardware to return fuel into your tank. Additionally, you're getting a 4.9 wideband oxygen sensor with a leak free oxygen sensor, oem style TPS/IAC, fuel pressure regulator, all Stainless Steel T-Bolt clamps and a Stainless Steel weldable flange. Once you made your conversion to EFI, don't stop there! Sniper is an Ecosystem! This kit pair's seamlessly together with Holley's Sniper Hyperspark Ignition, Fuel System's, Air Cleaners, Throttle Body Digital Dash to unlock the full potential of your build. Part # 34-42 is required for a bolt-in installation.
Part # 534-247 is required to complete installation.
Features:
- Bolt on 4150 Flange Carburetor Replacement
- Self-tuning ECU means you don??????t have to be a computer/tuning wiz to have EFI!
- 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!
- Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition RPM)
- High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
- Throttle body mounted ECU ???? no extra boxes to mount
- Supports up to 650hp with Four 100 Lb/Hr Injectors!
- All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
- Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
- Air entry is 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
- 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.
- Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
- Available in 3 finishes: Shiny, Black and coming soon, Gold
Details:
- CFM: 870
- Finish: Black
- Flange Style: 4150
- Fuel Pressure: 58.5 PSI
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet / Outlet Size: 3/4-16 Female O-Ring (AN 8)
- MAP Sensor: 2Bar
- Max Horsepower Rating: 650 Naturally Aspirated
- Model: 4150 EFI Conversion Throttle Body
- Transmission: 700R4/200R4
- Transmission: Ford C4/C6
- Transmission: TH350
Links
Instruction Sheet
Instruction Sheet
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
4.7 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Cute, soft, comfy
Size: 6-12 Months Infant, Color: Navy
I wanted a leather sole shoe for my ten month old daughter for playing outside this summer so she could have protection for her feet without a hard “supportive” shoe inhibiting her ability to learn to balance or affecting her feet as the bones continue to develop.
These are perfect, they are soft and easy to put on. The elastic in the ankle holds it on without being too tight and it doesn’t dig into her skin at all. Provide protection and grip as she learns to walk and are not too bulky at all. I got the 9-12 month size and it has enough room to accommodate a chubbier foot than my daughter has, but still fits well and looks adorable.
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Reviewed in the United States on June 25, 2024
★★★★★ 5
Love these
Size: 18-24 Months Infant, Color: Grey
These are awesome! My 15-month old wore these everywhere on our trip to Mexico. He scuffed them up quite a bit, but other than cosmetics, they're holding strong through sand, sprinklers, and general gallivanting around. They are super easy to get on, which also makes them easy for him to pull off. But as long as he's busy running a muck, he forgets they're even on his feet.
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Reviewed in the United States on January 21, 2026
★★★★★ 4
Sizing is off, send me free pair!
Size: 3-4 Years Toddler, Color: Navy, Size: 3-4 Years Toddler, Color: Navy
Sizing is off. I’m very frustrated. I ordered it to Costa Rica thru shipping company in Miami, which takes about 3 weeks to deliver and + shipping fee that they apply (20$)
I spent time and checked the size guide. According to the size guide, I ordered “3-4 years old” which supposed to be 16cm from heel to toe) the pair I ordered ended up being 17cm!
My baby’s feet are 15cm, I was planning to get 16cm for him to grow into it, but 17cm is too big. The shoes it self looks good, the leather is very soft and nice. I’m not sure how durable they are. Ordering first time from this brand. I ordered 2 pairs of shoes from a similar brand and liked it. They just didn’t have the size I needed. Although, the leather the previous brand uses for shoes seems much thicker. Again, I don’t know how durable “Dooty Fish” but I like how soft on skin they are.
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Reviewed in the United States on August 21, 2024
★★★★★ 5
Wide and flexible
Size: 18-24 Months Toddler, Color: White
Very cute I love the width and flexibility of the shoe 18 to 24 month is a bit too big for my 18 month old and she generally wears a size 6 1/2 shoe. I’m going to try the smaller size.
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Reviewed in the United States on July 15, 2025
★★★★★ 1
Don’t buy
Size: 12-18 Months Infant, Color: Navy
Cute little shoes but I would not recommend people buy these. The elastic broke on both shoes within a month. And they cannot get even a tiny bit of water on them. (Which is impossible with a toddler) If they do get wet the bottoms become dangerously slick. I wanted to get nice little barefoot shoes that I could use as hand-me-downs for future kiddos but these were not it. Horrible quality and not worth the money.
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Reviewed in the United States on August 23, 2025