CARB Executive Order · Other Engine Part
EO D-550-5
Advanced Flow Engineering · Silver Bullet
- Executed
- October 2012
- Rows shown
- —
- PDF pages
- 4
We show basic details only for this EO. Its vehicle list is not a ruled table we can read reliably (often a scanned table or a list in the text), so we do not copy it. Check the vehicles and part numbers in the original PDF.
What the EO says about the part
The Silver Bullet is an aluminum spacer plate, approximately one inch thick with machined helical grooves on the inside ports, and is installed under the vehicle's throttle body or carburetor.
Quoted from EO D-550-5. The EO exempts the part from California Vehicle Code Section 27156 only for the vehicles it lists.
More EOs from Advanced Flow Engineering
All 61 Advanced Flow Engineering EOs we read All vehicles with an EO-listed other engine partSource: CARB Executive Order D-550-5 (PDF), retrieved November 11, 2026. EOs can be amended, superseded or revoked; CARB's copy is the authority. Independent reference, not affiliated with CARB.