Granatelli Motor Sports GMTBLT4P Billet Throttle Body 103mm Drive-By-Wire Polished LT1 LT4 LT5

The Granatelli Motor Sports GMTBLT4P is a high-performance 103mm Drive-By-Wire billet throttle body engineered for GM Gen V LT1, LT4, and LT5 engines. Precision CNC-machined from billet 6061-T6 aluminum, this throttle body is built to maximize airflow, improve throttle response, and deliver measurable horsepower gains over the factory unit. The GMTBLT4P features a polished finish for a premium underhood appearance.

Key Features:

• 103mm Bore: Larger diameter than OEM significantly increases airflow for improved engine efficiency and power output
• Billet 6061-T6 Aluminum Construction: CNC-machined from high-grade billet aluminum for superior durability and precision
• Drive-By-Wire Compatible: Utilizes the late-model GM 6-pin connector for a plug-and-play installation — no need to transfer components from the factory unit
• Boost Capable: Electronic motors are rated to handle up to 25 lbs of boost in both draw-through and blow-through configurations
• Unique Throttle Blade Design: Prevents the blade from being forced closed under high-boost applications
• Aftermarket Manifold Ready: Designed primarily for use with aftermarket intake manifolds; use Granatelli spacer GMTBLTSPC for factory manifold fitment
• Polished Finish: Show-quality mirror-polished exterior

Dyno testing has demonstrated real-world gains when upgrading to this throttle body as part of a performance build. Note: ECU tuning is required after installation. For use with factory intake manifolds or non-ported superchargers, pair with the Granatelli manifold spacer (part number GMTBLTSPC).