Genuine Johnson PC-1125AP X1 Connecting Rod Bearing Set (NORS)
Precision-engineered for the peak era of Pontiac performance, this premium NORS (New Old Replacement Stock) Rod Bearing Set by Johnson is designed for "Big Journal" V8 engines. This set provides critical fitment for high-performance 389 cubic inch engines, specifically the 1964–1965 GTO and the 1963 models equipped with the "Triple 2 B.C." (Tri-Power) induction system. Additionally, it provides factory-spec support for the 400, 421, 428, and 455 V8 families, as well as the unique 194.5 L4 found in early Tempests. Proudly made in the USA, these bearings are vital for restoring proper crankshaft protection and maintaining reliable oil pressure in legendary muscle cars like the GTO, Trans Am, and Bonneville. Finished to a .001" (X1) undersize, these bearings are an ideal choice for addressing minor crankshaft journal wear or achieving precision clearances in a professional-grade engine overhaul.
Key Features:
- Brand: Johnson
- Part Number: PC-1125AP
- Interchange: Federal Mogul CB683P, TRW CB683P, Sealed Power CB683P
- Position: Connecting Rod Bearings
- Engine Fitment: Pontiac V8 (389, 400, 421, 428, 455 CID) & L4 (194.5 CID)
- Size: .001" Undersize (X1)
- Origin: USA
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make |
Engine Displacement |
Year Range |
Model / Series Notes |
| Pontiac |
389 V8 (Tri-Power) |
1963 |
Equipped with Triple 2 B.C. |
| Pontiac |
389 V8 (GTO) |
1964-1965 |
High Performance GTO Models |
| Pontiac |
400 V8 |
1967-1976 |
GTO / Firebird / LeMans / Grand Prix |
| Pontiac |
421 V8 |
1961-1966 |
Super Duty / HO Models |
| Pontiac |
428 V8 |
1967-1969 |
Full Size Models / Grand Prix |
| Pontiac |
455 V8 |
1970-1976 |
Trans Am / Firebird / Grand Prix / HO |
| Pontiac |
194.5 L4 |
1961-1963 |
Tempest 4-Cylinder |
Fits Years:
1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
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
While many of our vintage parts were manufactured decades ago, they remain unused and high-quality. Some original boxes may show signs of shelf-wear, such as dust, tape, or surface distress from years of storage. Rest assured, the components inside have been inspected to ensure they are complete and ready to help you finish your project without breaking the bank.
