GM LS EFI Thottle Body 105mm w/o Tapered Bore

The Holley GM LS EFI Throttle Body 105mm without tapered bore is a precision fuel injection component engineered for high-performance LS-series engine builds and race applications. Designed for technicians and enthusiasts who demand accurate throttle control and reliable EFI tuning, this billet throttle body replaces OEM units with a purpose-built platform that integrates seamlessly into modern engine management systems. The 105mm single-blade design provides unrestricted airflow while maintaining metering precision essential for fuel injection mapping and engine optimization.

Manufactured from aluminum and finished in black anodize, the GM LS EFI Throttle Body features a 4-bolt stock flange configuration that bolts directly to LS intake manifolds without modification. The straight bore design—absent a restrictive tapered section—maximizes volumetric efficiency across the RPM band, allowing tuners to dial in precise fuel delivery curves without compensating for airflow impedance. Weighing 2.97 lbs, the compact 6.35 x 4.65 x 10.4-inch profile integrates into tight engine compartments while the black anodized finish resists corrosion and maintains a professional appearance under hood. This billet construction eliminates casting porosity common in OEM units, ensuring superior durability under high-boost and high-rev conditions.

Engine builders, tuners, and LS swap specialists benefit most from this throttle body when upgrading to aftermarket fuel injection or recalibrating stock EFI systems for modified displacement or boost applications. Compatibility extends across all GM LS-series platforms—LS1, LS2, LS3, LS7, and LS9—making it ideal for crate engine builds, restomod projects, and performance street cars. Installation requires standard hand tools and basic EFI wiring knowledge; most builds incorporate this component alongside a quality fuel pressure regulator and tuned intake manifold for optimal results. For those pursuing repeatable quarter-mile performance or street reliability, this Holley throttle body serves as a foundational upgrade that supports future tuning refinements and power increases.