Granatelli Motor Sports GM LS3 6.2L Drive-By-Wire Billet Throttle Body GMTBLS108

Granatelli Motorsports GMTBLS108 108 mm Drive‑By‑Wire Throttle Body

TUNE MAY BE REQUIRED(custom tuning recommended for Trailblazer SS builds)

Upgrade your LS3, LSA, or LSX engine with the Granatelli 108 mm throttle body—CNC‑machined from high‑grade 6061‑T6 billet aluminum to deliver massive airflow gains and sharper throttle response. Whether you're running naturally aspirated or boosted, this throttle body keeps up.

Key Features

• 108 mm Bore delivers ~40% airflow increase at 7,000 RPM, unlocking power and improving throttle response


• High-Performance Motor safely controls airflow under boost setups (up to 25 psi)


• Plug-and-Play Fitment: Direct replacement with included adapter; no parts to transfer and uses the OEM GM 6‑pin connector


• Intake Compatibility: Works with factory and aftermarket manifolds—ideal for TVS, Whipple, and Roots-style superchargers


• Smoother Power Delivery across all RPMs—bringing quicker acceleration and cleaner throttle transitions

Important Notes

• TUNE MAY BE REQUIRED after installation for optimal idle, drivability, and driveline protection


• Trailblazer SS builds require custom calibration—please call before ordering

Why You'll Love It

Bolt it on, tune it, and drive—this throttle body delivers real airflow gains and throttle sharpness in a build-ready package, no parts transfers, no hassle. Expertly engineered for enthusiasts aiming for a reliable and powerful upgrade that’s ready to handle serious power.