The aFe Silver Bullet Throttle Body Spacer (MPN 46-34003) is a billet-aluminum spacer for the GMT900 generation of GM full-size V8 trucks and SUVs. The manufacturer specifies 6061-T6 billet construction, and the spacer uses a serrated/helix entry that agitates incoming air just before it reaches the engine. Compared with stock, the extra length lengthens the intake tract, which aFe says increases air intake speed and sharpens throttle response. The serrated/helix profile also reduces the intake whistle that helix-only spacers are known for. Owners on user forums are openly skeptical that spacers like this add measurable horsepower on injected engines, so buy this for throttle feel, fit, and finish, and treat any power claim as unverified.
Fitment is the first thing to confirm. The manufacturer's page lists GM Trucks/SUVs from 2007 to 2013 with 4.8L, 5.3L, 6.0L, and 6.2L V8 engines, while the product title reads 2007-2011 and omits the 6.0L. Check your model year and engine against the manufacturer before ordering. The manufacturer also lists a filter and coupler as included. Long-tail searches this part serves include GMT900 throttle body spacer, billet 5.3 V8 throttle spacer, 6.2 Tahoe or Yukon throttle body spacer, and serrated helix whistle-free intake spacer.
The manufacturer lists the spacer for 2007-2013 GM Trucks and SUVs with the 4.8L, 5.3L, 6.0L, and 6.2L V8 engines. The product title in this listing reads 2007-2011 and omits the 6.0L, so details vary. Confirm your exact model year and engine with the manufacturer before ordering.
The manufacturer lists both a filter and a coupler as included with the 46-34003 spacer.
