Speed Pro 151M Engine Crankshaft Main Bearing Set

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Speed Pro 151M Engine Crankshaft Main Bearing Set

Brand	Speed Pro 151M
Application	Competition Series
Displacement	421, 428, 455
Engine Family	V8
Manufacture	Pontiac
Material	Super Duty Alloy
Part Material	Steel backed overplated bronze alloy
Set Type	Main Set
Sizes	Std-10
Standard Size	Standard
Fits	Pontiac · 76 vehicles

Competition Series. Built for demanding engine builds and performance use.

3/4 grooved. Promotes steady oil flow across the bearing surface.

Steel-backed bronze alloy. Combines strength with a durable overplated bearing surface.

$104.16Free shipping

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Speed Pro 151M Pontiac Main Bearing Set

Speed Pro 151M is a Pontiac V8 engine crankshaft main bearing set built for Competition Series use. It is a standard-size main set with a 3/4 grooved design and steel backed overplated bronze alloy construction for Pontiac 421, 428, and 455 engines.

Key Features

Part number: 151M
Competition Series Pontiac main bearing set
3/4 grooved design for Pontiac V8 lubrication needs
Standard size: Std-10
Steel backed overplated bronze alloy bearing material
Super Duty Alloy material specification
Engine family: Pontiac V8
Displacement coverage: 421, 428, 455

Detailed Description

This Speed Pro 151M crankshaft main bearing set is specified for Pontiac V8 performance builds that require a standard-size main bearing solution with 3/4 groove oiling. It is listed for 1961-1976 Pontiac Catalina, 1963-1976 Pontiac Bonneville, 1963-1976 Pontiac Grand Prix, 1970-1974 Pontiac LeMans, 1970-1973 Pontiac GTO, 1971-1976 Pontiac Firebird, 1973-1975 Pontiac Grand Am, 1975-1976 Pontiac Grand LeMans, and other Pontiac full-size and intermediate applications in the same engine family. The 151M is a direct-fit style choice for Pontiac 421, 428, and 455 engine combinations where standard-size main bearings and a 3/4 grooved profile are required.

Speed Pro positions this component for drivers who need dependable engine hardware for track use, strip use, or street performance. The bearing construction combines a steel backing with an overplated bronze alloy surface to support crankshaft main journal service in Pontiac V8 builds.

What It Helps Address

Worn or damaged Pontiac crankshaft main bearings
Loss of proper main bearing oiling in 3/4 groove applications
Need for a standard-size main bearing set during rebuilds
Service replacement for Pontiac 421, 428, and 455 engine assemblies
Performance rebuilds for Pontiac Bonneville, Catalina, Firebird, GTO, and Grand Prix

Installation Notes and Tips

Verify crankshaft journal size, bearing clearance, and block condition before assembly. Confirm that your Pontiac engine requires a standard-size main bearing set and a 3/4 grooved configuration before installation. Clean all oil passages thoroughly and follow the engine builder’s torque and lubrication specifications during final assembly. Fits 1963-1976 Pontiac Bonneville, N/A; Fits 1961-1976 Pontiac Catalina, N/A; Fits 1971-1976 Pontiac Firebird, N/A; Fits 1975-1976 Pontiac Grand LeMans, N/A; Fits 1963-1976 Pontiac Grand Prix, N/A; Fits 1976 Pontiac Laurentian, N/A; Fits 1971-1974 Pontiac Laurentian, N/A; Fits 1976 Pontiac LeMans, N/A; Fits 1970-1974 Pontiac LeMans, N/A; Fits 1976 Pontiac Parisienne, N/A; Fits 1970-1974 Pontiac Parisienne, N/A; Fits 1973-1975 Pontiac Grand Am, N/A; Fits 1970-1973 Pontiac GTO, N/A.

Quality Assurance

Speed Pro supplies engine components for performance and street applications with a focus on value, fit, and material selection. Part number 151M is built to the listed Pontiac V8 specifications for rebuild and performance use.

This part fits 76 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
1976	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	Firebird	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	Grand LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	Laurentian	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1976	Pontiac	Parisienne	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1975	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1975	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1975	Pontiac	Firebird	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1975	Pontiac	Grand Am	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1975	Pontiac	Grand LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1975	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Firebird	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Grand Am	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Laurentian	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1974	Pontiac	Parisienne	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Firebird	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Grand Am	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	GTO	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Laurentian	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1973	Pontiac	Parisienne	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	Firebird	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	GTO	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	Laurentian	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1972	Pontiac	Parisienne	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	Firebird	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	GTO	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	Laurentian	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1971	Pontiac	Parisienne	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1970	Pontiac	Bonneville	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1970	Pontiac	Catalina	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1970	Pontiac	Grand Prix	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1970	Pontiac	GTO	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1970	Pontiac	LeMans	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1970	Pontiac	Parisienne	7.5L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1969	Pontiac	Bonneville	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1969	Pontiac	Catalina	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1969	Pontiac	Grand Prix	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1968	Pontiac	Bonneville	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1968	Pontiac	Catalina	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1968	Pontiac	Grand Prix	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1967	Pontiac	Bonneville	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1967	Pontiac	Catalina	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1967	Pontiac	Grand Prix	7.0L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1966	Pontiac	Bonneville	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1966	Pontiac	Catalina	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1966	Pontiac	Grand Prix	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1965	Pontiac	Bonneville	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1965	Pontiac	Catalina	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1965	Pontiac	Grand Prix	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1964	Pontiac	Bonneville	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1964	Pontiac	Catalina	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1964	Pontiac	Grand Prix	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1963	Pontiac	Bonneville	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1963	Pontiac	Catalina	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1963	Pontiac	Grand Prix	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1962	Pontiac	Catalina	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
1961	Pontiac	Catalina	6.9L	V8	N/A	Performance main bearing set with 3/4 grooves in standard size.
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