SKU: 95742581166

Holley Sniper EFI Self-Tuning Fuel Injection Dual Quad System # HO550-527

Sale price$1878.75 Regular price$2087.50
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Description

Holley Sniper EFI Self-Tuning Fuel Injection Dual Quad System # HO550-527Holley Sniper EFI Self Tuning Fuel Injection Dual Quad System # HO550 527 Fuel Injection System, Holley Super Sniper 1250 HP, 4150 Flange, Self Tuning, Aluminum, Polished, Throttle Body, Kit Fuel Injection Style: Throttle body Fuel Injection System Type: Dual 4 Barrel Throttle Bodies (4150 Flange) Maximum Horsepower with Gas: 1,250 Timing Control Compatible: Yes Power Adder Compatible: No ECM Included: Yes Self Tuning: Yes User Tunable: Yes Fuel Pump

Holley Sniper EFI Self-Tuning Fuel Injection Dual Quad System # HO550-527
Fuel Injection System, Holley Super Sniper 1250 HP, 4150 Flange, Self-Tuning, Aluminum, Polished, Throttle Body, Kit
Fuel Injection Style:
Throttle body
Fuel Injection System Type:
Dual 4-Barrel Throttle Bodies (4150 Flange)
Maximum Horsepower with Gas:
1,250
Timing Control Compatible:
Yes
Power Adder Compatible:
No
ECM Included:
Yes
Self Tuning:
Yes
User Tunable:
Yes
Fuel Pump Included:
No
EGR:
No
Transmission Controller Included:
No
Metering Style:
Speed density
Intake Manifold Included:
No
Multi-Port Fuel Rails Included:
No
Throttle Body Included:
Yes
Throttle Body Mounting Flange:
4-barrel square bore
Venturi Quantity:
8
Airflow Rate (cfm):
1,600 cfm
Throttle Body Material:
Cast aluminum
Throttle Body Finish:
Polished
Injectors Included:
Yes
Injector Size (lbs/hr):
100 lbs./hr.
Calibration Module Included:
Yes
Wiring Harness Included:
Yes
Oxygen Sensor Included:
Yes
Fuel Pressure Regulator Included:
No
Distributor Included:
No
MAP Sensor Included:
Yes
IAT Sensor Included:
No
TPS Sensor Included:
Yes
IAC Motor Included:
Yes
Quantity:
Sold as a kit.
Notes:
The Sniper EFI 4150 2x4 was designed for use on naturally aspirated engines. The system requires a high pressure fuel pressure regulator and fuel pump capable of supplying the fuel demand and maintain 60 psi of fuel pressure at all conditions.
Holley Sniper EFI Self-Tuning Fuel Injection Systems
Holley Sniper EFI self-tuning fuel injection systems deliver all the benefitsand none of the hassles. These full-featured throttle bodies are easy to install, can support a lot of horsepower, and will keep your budget intact. They put an end to carburetor cold start issues, hesitations, vapor lock, and flooding. Each Sniper EFI self-tuning fuel injection system includes an internal fuel pressure regulator (preset to 58.5 psi), eliminating the hassle of plumbing an external model. Make your conversion simple, while getting maximum bang for your buck with a Holley Sniper EFI self-tuning fuel injection system. Order the model for your application needs.Holley Sniper EFI self-tuning systems feature: Available finishes: black ceramic, classic gold, and shiny Available in base and master kits (master kits include complete fuel system: 20 ft. of Earl's Vapor Guard fuel hose; 12-920 fuel pump; filters; necessary hardware, and bulkhead fitting for returning fuel to tank) Dual-pattern bolt-on carburetor replacement, designed to fit 4150 flange and spread-bore manifolds (spread bore sealing plate 9006 recommended) Supports up to 650 hp with four 100 lbs./hr. injectors 4-wire vehicle connection: battery +, battery -, switched ignition, and rpm Integrated ignition timing control and coil driver Color touchscreen for setup and gauge views Calibration wizard and self-tuning, integral-mounted ECU no laptop required
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 95742581166

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Verified Purchase
Danyelle
Louisville, US
★★★★★ 5
My dog's obsession
Color: Octopus Yellow & Green
My dog has been obsessed with these since he was a puppy. I started buying them in 6 packs. He chews is after each meal like dental floss and it's always soggy and gross. I keep an eye on the legs and throw it away when he begins to chew through them. One lasts him a couple months (80 pound Lab).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
T
Verified Purchase
Tricia S.
Louisville, US
★★★★★ 5
Great for treats
Color: Octopus Purple & Blue
We purchased this to keep our dog busy and engaged. He seems to enjoy it. We placed 1 or 2 treats in the tentacles and then loosely tie them. He can not untie them but can still manage to get the treats out. It amuses him for 10-12 minutes which is great. Only downside I can see is that the octopus is going to get grungy soon because of the treats and the treats and the constant licking to remove them. Not sure how it will washup but we will try. Very soft and decent squeaky sound.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026
J
Verified Purchase
Jack Daniels
Port Orchard, US
★★★★★ 5
Durable
My dog loves it. She takes it to  bed every night. It is sturdy, doesn’t seem like it will rip easily.  Why did you pick this product vs others?: Trying to replace a raccoon she got 4 year’s ago.  Squeak: Only squeaks when I squeeze it. 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 24, 2025
A
Verified Purchase
Alice A. Martin
New York, US
★★★★★ 5
As with all stuffed toys, supervision is needed.
I have a 6 month old standard size Golden Doodle who has gone through several raccoon toys. He loves their tails and to make them squeak. He knows the word raccoon, so when the last one “died”, I had to get another. This one is well made and has a magnificent tail. It did not take long, however, for Marvin to amputate two of the raccoon’s feet and pull the stuffing out. Luckily, I was able to get it from him before he swallowed any, and was able to sew up the injuries and return it to him for another round of play. I do not expect more from a stuffed toy, but I do not leave my dog alone with one and accept that supervision is always necessary. This raccoon is charming and when it “dies” I will probably buy it again. Five stars!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2020
S
Verified Purchase
susan Haralson
New York, US
★★★★★ 5
Worth the money
El destructo not able to tear this one apart although he gave it his best effort.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026

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