aFe 46-31006 Silver Bullet Throttle Body Spacer for BMW E60/E63/E53 N62

Vehicle Fitment

• 2004-2010 BMW 550i (E60, N62 4.8L)
• 2004-2005 BMW 545i (E60, N62 4.4L)
• 2006-2010 BMW 650i (E63/E64, N62 4.8L)
• 2004-2005 BMW 645Ci (E63/E64, N62 4.4L)
• 2006-2008 BMW 750i / 750Li (E65/E66, N62 4.8L)
• 2004-2006 BMW X5 4.8is (E53, N62 4.8L)

Features

• Machined from T-6061 billet aluminum for strength and lightness
• Unique serrated/helix internal design to generate airflow turbulence
• Increases volumetric efficiency by creating extra volume between throttle body and intake manifold
• Helps improve throttle response and overall engine performance
• Reduces the typical "whistle" found in helix-only spacers
• 50-state legal with CARB E.O. number D-550-11
• Easy, no-drill installation using included hardware
• Backed by a 2-year aFe limited warranty

Specifications

• Material: T-6061 billet aluminum
• Finish: Clear machined / anodized aluminum
• Thickness: ~1.0" spacer (increases intake volume)
• Emissions: 50-state legal (CARB E.O. D-550-11)
• Warranty: 2 years (aFe) :contentReference[oaicite:0]{index=0}

Included Components

• 1x aFe Silver Bullet throttle body spacer (billet aluminum)
• 1x Installation hardware set (bolts, gaskets as required)
• 1x Installation instruction sheet

Product Description

The aFe 46-31006 Silver Bullet Throttle Body Spacer is a performance part engineered to boost throttle response and torque on a range of BMW N62-engine vehicles. By inserting this spacer between the throttle body and intake manifold, you increase the intake volume, which helps the engine breathe more freely and generate a smoother, more efficient airflow.

Precision-machined from T-6061 billet aluminum, this spacer features a serrated/helix design that induces just the right amount of turbulence - enough to improve combustion but not so much that it causes unwanted whistle noise at idle or cruising. It's a simple bolt-on upgrade that delivers a dyno-proven gain of **+10 hp / +14 lb-ft torque** (as tested by aFe), and is legal in all 50 U.S. states under CARB E.O. D-550-11.

Installation is straightforward and requires no major modifications; the included hardware and instructions let you complete the job with basic hand tools. Whether you're driving a BMW 550i, 650i, 750i, or X5 with the N62 V8 engine, the 46-31006 spacer offers an efficient, economical way to extract a bit more performance from your engine without sacrificing reliability or driveability.