CARB Executive Order · Air Intake
EO D-418-48
Roush Performance Products · Mustang Air Intake System
- Executed
- September 2026
- Rows shown
- 1
- PDF pages
- 3
Vehicles and part numbers in Exhibit A
Rows below are copied from the EO's vehicle table (Exhibit A). Listed in CARB EO D-418-48; final determination by CARB / Smog Check station.
2024–2025 Ford Mustang, Mustang Dark Horse · 5.0L
422334
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What the EO says about the part
The Mustang Air Intake System consists of two new air box lids with see-thru window and two air filters to replace the stock components. The bottom portion of the stock airboxes are retained and not modified in any way. No sensors are modified or relocated, and the electronic control unit is not re-flashed as part of this installation.
Quoted from EO D-418-48. The EO exempts the part from California Vehicle Code Section 27156 only for the vehicles it lists.
More EOs from Roush Performance Products
All 50 Roush Performance Products EOs we read All vehicles with an EO-listed air intakeSource: CARB Executive Order D-418-48 (PDF), retrieved November 11, 2026. EOs can be amended, superseded or revoked; CARB's copy is the authority. Independent reference, not affiliated with CARB.