CSP SAVINGS!

CSP2026

Sniper 550-877 - Holley EFI Super Stealth 1250 - Black

Sniper  |  SKU: SNIP-550-877
Sale price $2,24995 Regular price $2,53195

DISCLAIMER: This Item Is Special Ordered, which may have cancellation or return restrictions. Please see our terms and conditions for more information.


AVAILABILITY: This Item Is Out Of Stock.


PLEASE NOTE: Pictures may be representative of style, rather than the actual product. Read the description for more details.

Description

Sniper 550-877 - Holley EFI Super Stealth 1250 - Black

Holley Sniper EFI Super Sniper Stealth 1250 - Black

Supports Up To 1250HP Boosted - 3.5 in. Handheld Monitor - Carburetor Styling

If you're looking to make some big power, the Super Sniper Stealth is made for you! Holley's Sniper EFI Super Sniper Stealth 1250 is the best way to convert your carbureted engine to fuel injection with just 4 simple connections required. Super Sniper can support up to 1250HP boosted with 8 100 LB/HR Injectors. With a Stealth 1250 system, you get that carburetor styling but the functionality of a Sniper! This 4-barrel system features a single pattern bolt on design built to fit 4150 flange manifolds. The Super Sniper Stealth ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower. Additionally, this Sniper kit also includes transmission kick down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications!

  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
  • 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
  • Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions.
  • OEM Style TPS/IAC, for years of dependable service.
  • Six Programmable Ground Outputs
  • Bolt on 4150 Flange Carburetor Replacement
  • Throttle body mounted ECU – no extra boxes to mount
  • External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886.
  • One Sensor Ground – Ground supply for 0-5v Sensors
  • Programmable inputs and outputs
  • Integrated ignition timing control
  • Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
  • Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
  • Available in 3 finishes: Shiny, Black and coming soon, Gold
  • Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure Sensors
  • Supports up to 1250hp with Eight 100 Lb/Hr Injectors!
  • One +5v Reference Output - +5V Power Supply for 0-5v Sensors
  • All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
Accelerometer Support: No
Boost Control: No
Brand: Holley Sniper EFI
CAN-BUS Support: No
Category: Air and Fuel Delivery
CFM: 870
Coil Per Cylinder Ignition Support: No
Datalogging Support: Yes
Distributor Included: No
Dry Nitrous Control: Yes
e85 Support: No
EGT Support: No
Emission Code: 3
Finish: Black
Flange Style: 4150
Forced Induction Support: Yes
Fuel Filter Included: No
Fuel Hose Included: No
Fuel Injectors Included: Yes
Fuel Pressure: 58.5 PSI
Fuel Pressure Regulator Included: No
Fuel Pump Included: No
Grade Type: Performance
Height: 3.28"
Ignition Timing Control: Yes
Individual Cylinder Fuel Corrections: No
Injector Size: 100 lb/hr @ 58.5 PSI
Inlet / Outlet Size: 3/4-16 Female O-Ring (AN 8)
Intake Manifold Included: No
Knock Retard Support: No
MAP Sensor: 2 Bar
Max Horsepower Rating: 650 Naturally Aspirated
Max Horsepower Rating: 1250 Forced Induction
Model: 4150 EFI Conversion Throttle Body
Multi-Stage Nitrous Control: Yes
part type: Fuel Injection Conversion Kit
Product Type: Super Sniper Stealth 4150 - 1250 HP
Progressive Nitrous Control: Yes
Self-Tuning: Yes
Sub Category: Service Kits
Throttle Position Sensor Included: Yes
Traction Control Support: No
Transmission: 700R4/200R4, Ford C4/C6, TH350
User-Tuneable: Yes
Warning: California Proposition 65
Wet Nitrous Control: Yes

What are people saying about CSP?