Holley 550-1021

Features:

• Kick down provisions for GM TH350, TH400, 200R4/700R4, and Ford C4/C6 transmissions
• Plug-and-play integrated ignition timing control with the factory GM LS coil sub-harness and OEM coils - no external boxes or modules are needed
• Four inputs (12 V, ground, 5 V, and frequency) for adding additional pressure sensors such as nitrous activation triggers or a trans brake - fuel and oil pressure inputs are pre-terminated
• Four outputs (ground, PWM) for adding accessories such as fans, boost control, or nitrous control
• Fits most stock-style air cleaners and has air cleaner locator provisions
• Full-color high-definition (HD) touchscreen display for initial setup, gauge readouts, and tuning
• Factory-style throttle position sensor (TPS) and idle air control (IAC)
• The Bosch LSU 4.9 wideband oxygen sensor (O2) provides real-time fuel-MAP learning
• All wiring exits below the fuel injector bowls for a clean and organized appearance
• Easy step-up through the self-tuning Calibration Wizard - no laptop is required
• Compatible with Holley EFI digital dashes, gauges, and fuel system accessories

Note:

• An external fuel pressure regulator is required (not included) - set base pressure to 58.5 PSI

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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