Roush
Exhaust, Mufflers & Tips › Exhaust Cutouts
RSH Exhaust Valves
Part # rsh421926 MFR # 421926 UPC 844764005792 ID 318611
ROUSH 2015-2017 Ford Mustang ACTIVE Exhaust Upgrade Kit (Requires ACTIVE-READY Exhaust Kit)
✓ In Stock (4 locations)
$1,724.99
MSRP $1,749.99
Save $25.00 (1% off)
Free ground shipping on eligible orders
⚠️ Prop 65 Warning — Contains chemicals known to the State of California to cause cancer or reproductive harm.
⚠️ Not CARB Approved — Race/off-road use only. Not legal for street use on California-registered vehicles.
⚠️ CARB Acknowledgment Required — Buyer must confirm emissions compliance at checkout.
Identification
| Brand | Roush |
|---|---|
| Part Number | rsh421926 |
| MFR Part # | 421926 |
| UPC / Barcode | 844764005792 |
| Item ID | 318611 |
| Price Group | Roush |
| Born-On Date | 2019-08-27 |
| Category | Exhaust, Mufflers & Tips |
| Subcategory | Exhaust Cutouts |
Dimensions & Shipping
| Dimensions | 19.8" × 12.5" × 6.2" (L×W×H) |
|---|---|
| Weight | 10.80 lbs |
| LTL Freight | Standard Parcel |
| Air Shipping | Eligible |
Stock & Availability
| Status | ✓ In Stock (4 locations) |
|---|---|
| Warehouses |
● 01
● 02
● 03
● 59
|
| Regular Stock | No |
| Powersports | No |
Compliance & Regulations
| Prop 65 | ⚠ Warning Required |
|---|---|
| CARB | Not CARB Approved |
| CARB Ack. | Required |
| Active | Active |