Genuine BlueStreak VR423XP 12V Polamatic Voltage Regulator (NORS)
This is a genuine BlueStreak "Polamatic" New Old Replacement Stock (NORS) voltage regulator, part number VR423XP, proudly made in the USA by Standard Motor Products. Designed for 12-volt charging systems, this premium regulator features BlueStreak's innovative "Polamatic" technology, which allows it to automatically adapt to either positive or negative ground applications. This heavy-duty unit is an ideal choice for 1960s and early 1970s General Motors vehicles, providing the reliable voltage control needed to protect your classic's battery and electrical system from surges. As an "XP" series component, it is built with high-grade materials and a robust internal design that offers superior resistance to vibration and heat compared to standard aftermarket units.
Key Features:
- Brand: Standard / BlueStreak
- Part Number: VR423XP
- Interchange: Delco U640, ACDelco 19140236, Echlin VR1026
- Position: Firewall or Fender Mounted
- Engine Fitment: L6 & V8 Engines
- Origin: Made in USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make |
Model |
Year |
Engine |
Notes |
| Chevrolet |
Impala / Chevelle / Camaro / Nova |
1963-1972 |
All |
Delco 12V System |
| GMC / Chevrolet |
C10 / C20 / K10 Truck & Suburban |
1963-1972 |
All |
Delco 12V System |
| Pontiac |
GTO / Lemans / Firebird / Catalina |
1963-1972 |
All |
Delco 12V System |
| Oldsmobile |
Cutlass / 442 / Delta 88 |
1963-1972 |
All |
Delco 12V System |
| Buick |
Skylark / GS / Riviera / LeSabre |
1963-1972 |
All |
Delco 12V System |
Fits Years:
1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
Actual Item Photos: Please look over the pictures carefully, as they depict the exact item you will receive. We utilize high-resolution photos of our current physical inventory rather than generic stock images so you can verify the specific condition, markings, and authenticity of this vintage part prior to purchase.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these parts may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Unbeatable Prices & Expectations
This is a high-quality vintage component. As with many New Old Replacement Stock (NORS) parts, the item and its packaging may exhibit minor "shelf wear" consistent with several decades of storage. This can include light surface oxidation on the metal cover, dust, or minor box deterioration, none of which affect the structural integrity or electrical performance of the regulator. These components represent the original manufacturing quality of a bygone era, often far exceeding the standards of modern aftermarket replacements.
