The aFe Silver Bullet throttle body spacer installs between the throttle body and intake manifold on the E46 BMW 325i, 325Ci and 325xi with the 2.5L inline-six. Its serrated/helix entry creates turbulence at the manifold to improve throttle response and low-end torque, without the whistle produced by helix-only spacers. It is precision machined from durable T-6061 billet aluminum and works with aFe intakes.
Specifications
| Type | Throttle body spacer (Silver Bullet) |
| Material | T-6061 billet aluminum |
| Fitment | BMW 325i, 325Ci, 325xi (E46, L6-2.5L) |
| Engine | L6-2.5L |
| Hardware Included | Yes |
| Gaskets Included | Yes |
| Finish | Natural |
| Color | Raw |
| Thickness | 1 IN |
| Gains | Up to +10 Horsepower hp and +14 Ft-Lbs lb-ft (aFe dyno) |
| Emissions | CARB EO D-550-11 (50-state legal) |
| Part Number | 46-31008 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2001-2006 | BMW | 325Ci | Base |
| 2001-2005 | BMW | 325i | Base |
| 2001-2005 | BMW | 325xi | Base |
Documents: Installation Instructions (PDF)
Which vehicles does this fit?
- It fits the BMW 325Ci 2001-2006, BMW 325i 2001-2005, BMW 325xi 2001-2005. The full year, make, model and submodel list is in the fitment table on this page.
Is it legal in my state?
- CARB EO D-550-11 (50-state legal).
What is it made of?
- T-6061 billet aluminum.
Are installation instructions available?
- Yes. The manufacturer instruction PDF is linked under Documents at the bottom of the description.
Shipping
- Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
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