Holley EFI Terminator X Wideband Adapter Harness – Plug-and-play harness designed to connect Bosch LSU 4.9 wideband O₂ sensor to Holley Terminator X or Max ECUs.

Holley EFI Terminator X MPFI – Self-learning EFI system for LS2/LS3 & late LS truck engines with 58x/4x, featuring real-time tuning, high-impedance injector drivers, and built-in MAP sensor.

Holley EFI Standalone Digital Dash Kit – 7" customizable touchscreen display with sensors and I/O adapter for monitoring engine parameters in vehicles without an existing ECU.

Holley EFI NTK WB02 Sensor – High-performance wideband oxygen sensor for precise air-fuel ratio monitoring in Holley EFI systems.

Holley EFI LS7 Hi-Ram Intake Manifold, EFI, 105mm LS Throttle Body – High-performance intake manifold for GM LS7 engines, featuring a 105mm throttle body flange and black finish.

Holley EFI LS7 Hi-Ram Intake Manifold, EFI, 105mm LS Throttle Body – High-performance manifold designed for GM LS7 engines with a 105mm throttle body flange for improved airflow.

Holley EFI LS3 Lo-Ram Manifold Kit, Single Injector – Low-profile intake manifold designed for forced induction LS3/L92 engines with provisions for a single injector per cylinder.

Holley EFI LS3 Lo-Ram Manifold Kit, Dual Injector – High-performance intake manifold with provisions for dual injectors per cylinder, designed for GM LS3/L92 engines.

Holley EFI LS3 Hi-Ram Intake Manifold, EFI, 1 x 105mm LS Throttle Body, Black – High-performance manifold for GM LS3/L92 engines, designed for improved airflow with a 105mm throttle body flange.

Holley EFI LS3 Hi-Ram Intake Manifold, EFI, 1 x 105mm LS Throttle Body – High-performance manifold for GM LS3/L92 engines with a 105mm throttle body flange, optimized for improved airflow.

Holley EFI LS3 Hi-Ram Intake Manifold, EFI, 1 x 92mm LS Throttle Body, Black – High-performance manifold for GM LS3/L92 engines with a 92mm throttle body flange for optimized airflow.

The Holley EFI LS3 Black Hi-Ram Intake Manifold is a high-performance intake designed for LS3/L92 engines, featuring a black finish and compatibility with a 92mm LS throttle body.

Holley EFI LS1/2/6 Hi-Ram Intake Manifold, EFI, 105mm LS Throttle Body, Black – High-performance manifold for GM LS1, LS2, and LS6 engines with a 105mm throttle body flange for optimal airflow. 

Holley EFI LS1/2/6 Hi-Ram Intake Manifold, EFI, 105mm LS Throttle Body – High-performance manifold for GM LS1, LS2, and LS6 engines with a 105mm throttle body flange for enhanced airflow.

Holley EFI LS Injector Harness (Part #558-201) – Pre-terminated wiring harness for GM LSx engines, designed for EV6 (USCAR) style injectors, compatible with Holley HP, Dominator, and Terminator X ECUs.

​Holley EFI LED Light Bar (Part #553-107) – Fully programmable 14-LED shift and warning light bar with customizable colors, brightness, and flash rates, designed for use with Holley EFI digital dashes

Holley EFI Injector Driver Module, w/ Harness – 8-channel programmable injector driver with harness for integrating secondary injectors with Holley Dominator ECUs.

Holley EFI Idle Air Control (IAC) Valve Motor – OEM-style replacement for Sniper and Holley EFI throttle bodies, ensures precise idle control.

Holley EFI Hi-Perf C-N-P Smart Coil – High-performance ignition coil for 8-cylinder engines, designed for use with Holley HP and Dominator ECUs in high-powered applications.

Holley EFI HP Smart Coil Sub Harnesses – Pre-terminated harnesses for connecting Holley HP Smart Coils to the ECU, designed for 8-cylinder engines.