The aFe Silver Bullet Throttle Body Spacer, part 46-34016, is a CNC-machined billet spacer that mounts between the intake and throttle body on GM 6.2L V8 trucks. It is made from 6061-T6 aluminum and uses a serrated/helix entry that the manufacturer says reduces the whistle common to helix-only spacers. The manufacturer cites dyno testing showing gains of up to +4 HP and +9 lb-ft, which are modest numbers. Owners on user forums are more skeptical, with many reporting little noticeable change on modern injected engines. Buy this for a machined, factory-bolt-pattern fit and a whistle-reducing design rather than as a major power upgrade. It suits buyers searching for a 6.2L Silverado 1500 throttle body spacer, a serrated helix intake spacer, or a GM 6.2L V8 throttle response upgrade.
Compared with an unbranded spacer, this aFe unit ships with a filter and coupler, according to the manufacturer, and owner reports describe a provided gasket and extended mounting bolts. Its fitment note ties it to the 14-19 GM 1500 V8-6.2L platform and to aFe intakes that fit that platform. The manufacturer's own materials state year ranges inconsistently, so confirm your truck's year and intake setup with aFe before ordering. Because the spacer raises the throttle body, check clearance with your intake tube and engine cover before you buy.
The manufacturer's fitment note references the 14-19 GM 1500 V8-6.2L platform and states it works with aFe intakes that fit that platform. The manufacturer's materials do not state year ranges consistently, so confirm your vehicle with aFe before ordering.
Owners on user forums report that the kit includes a gasket and extended bolts for reattaching the throttle body. Confirm the full contents with the manufacturer.
The manufacturer says the serrated/helix design reduces whistle compared with helix-only spacers. Some owners on user forums still report a whistle at certain RPM.
The manufacturer says this spacer uses all factory mounting locations, so no drilling is needed. Owners on user forums describe a bench-level job for a home mechanic. Remove the engine cover, disconnect the intake elbow from the throttle body, and remove the four bolts holding the throttle body to the manifold. Set the spacer and gasket between the manifold and throttle body, making sure the arrow on the spacer points in the direction of airflow. Reinstall the throttle body with the extended bolts, reconnect the intake elbow, and replace the engine cover. Basic metric sockets and extensions should be enough. Clean the throttle body while it is off, and check that the intake tube and cover clear the raised throttle body before starting the engine.
