The Nick Williams 103 mm throttle body pushes your LS platform into a higher flow regime, letting your engine breathe more freely under heavy load. Built from solid billet aluminum and equipped with OEM-style electronics, this unit blends performance hardware with seamless integration. Whether you're chasing high-RPM power or smoother throttle dynamics, this upgrade unlocks new headroom for serious builds.
Made for GM LS engines (LS1, LS2, LS3, LS7, LS9, LSA) in performance builds
Requires aftermarket intake manifold sized to match the 103 mm diameter
Not compatible with factory LS intakes without modification
Tuning / engine calibration required for full functionality
Uses a 6-pin connector for late-model GM drive-by-wire wiring harnesses
CNC-machined 103 mm throttle body (natural / raw finish)
Drive-by-wire electronics and stepper motor pre-installed
Mounting bolts and hardware
Gasket or sealing O-ring
Installation instructions
Blade / venturi diameter: 103 mm
Material: Billet aluminum construction
Connector: 6-pin GM electronic interface
Finish: Raw / natural (uncoated)
Intake manifold requirement: Must accept 103 mm throttle blade
Requires tuning to enable full control and operation
Maximized airflow potential for high-horsepower builds
Turnkey electronic integration — stepper motor and electronics installed
Billet construction ensures structural rigidity at high RPM
Natural finish option allows custom finishing or matching your build
Future-proof upgrade — supports further modifications without needing another throttle body
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