The aFe Silver Bullet throttle body spacer fits between the throttle body and intake manifold on N54 twin-turbo BMWs, including the 135i, 335i and 535i. Its serrated/helix entry creates turbulence at the manifold to improve throttle response and low-end torque, without the whistle common to 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 135i, 335i, 335xi, 535i (N54, L6-3.0L) |
| Engine | L6-3.0L (tt) N54 Engine |
| Hardware Included | Yes |
| Gaskets Included | Yes |
| Finish | Natural |
| Color | Raw |
| Thickness | 0.75 IN |
| Emissions | CARB EO D-550-11 (50-state legal) |
| Part Number | 46-31002 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2010 | BMW | 135i | Base |
| 2007-2010 | BMW | 335i | Base |
| 2009-2010 | BMW | 335i xDrive | Base |
| 2008 | BMW | 335xi | Base |
| 2008-2010 | BMW | 535i | Base |
| 2009-2010 | BMW | 535i xDrive | Base |
| 2008 | BMW | 535xi | Base |
Documents: Installation Instructions (PDF)
Which vehicles does this fit?
- It fits the BMW 135i 2008-2010, BMW 335i 2007-2010, BMW 335i xDrive 2009-2010, BMW 335xi 2008, BMW 535i 2008-2010, BMW 535i xDrive 2009-2010 and 1 more models. 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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