Speed Pro 146M Engine Crankshaft Main Bearing Set
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Speed Pro

Speed Pro 146M Engine Crankshaft Main Bearing Set

Brand Speed Pro 146M
Application Competition series
Displacement 351c
Engine Family Cleveland/modified
Manufacture Ford
Material Super duty alloy
Part Material Steel backed babbitt or bronze alloy
Set Type Main set
Sizes Std-1-1x-10-20
Standard Size Standard
Fits Ford and Mercury · 74 vehicles

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

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

Super Duty Alloy. Uses a durable bearing material for dependable support.

Cross-references MB5503XP and MS1010H for the same application. See all 2.

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Ford Cleveland Main Bearing Set

The Speed Pro 146M engine crankshaft main bearing set is built for Ford Cleveland/Modified applications that need a standard-size performance main bearing solution. With a 3/4 grooved design and Super Duty Alloy construction, it is aimed at builders working on street performance or competition engines.

For Ford Mustang, Mercury Cougar, and other Cleveland-family builds, this main set supports crankshaft oiling and bearing stability in standard-size applications. Speed Pro 146M is a practical choice when you need a performance-oriented bearing set for a Ford 351C engine.

Key Features

  • Part number: 146M
  • Engine family: Ford Cleveland/Modified
  • Displacement: 351C
  • Competition Series application
  • 3/4 grooved design for oiling support
  • Standard size main set
  • Super Duty Alloy construction
  • Steel backed babbitt or bronze alloy bearing material

Detailed Product Overview

Speed Pro 146M is a crankshaft main bearing set for Ford 351C engines in the Cleveland/Modified family. The 3/4 groove layout is commonly selected in performance engine builds where controlled oil distribution and bearing durability matter. This set is intended for standard-size main bearing applications and is suited to rebuilds and performance refreshes in vehicles such as the 1970-1973 Ford Mustang and 1970-1974 Mercury Cougar.

This part cross-references Monroe Shocks & Struts (e.g., MB5503XP, MS1010H) for the same application.

What This Part Helps Address

  • Crankshaft main bearing wear in a Ford 351C engine
  • Oil film breakdown at the main journals
  • Loss of bearing support during performance use
  • Standard-size replacement needs during engine rebuilds
  • Fitment requirements for Cleveland/Modified engine builds

Installation Notes and Tips

Verify crankshaft journal size and bearing clearance before assembly. Confirm that the engine is a Ford Cleveland/Modified 351C application and match the standard-size specification to the crankshaft and block measurements. Clean all oil passages thoroughly and follow the engine builder’s torque and lubrication procedures during installation.

  • Fits 1970-1974 Ford LTD, N/A
  • Fits 1970-1974 Mercury Colony Park, N/A
  • Fits 1970-1974 Mercury Cougar, N/A
  • Fits 1970-1974 Mercury Marquis, N/A
  • Fits 1970-1974 Mercury Montego, N/A
  • Fits 1970-1973 Ford Mustang, N/A

Quality Assurance

Speed Pro states that its engine components are built to deliver the power, value, and quality expected in street and track use. Part number 146M is part of the brand’s performance-focused engine component lineup for Ford Cleveland/Modified applications.

Related reading

This part fits 74 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
1974FordCountry Sedan5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordCountry Squire5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordCustom 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordGalaxie 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordGran Torino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordLTD5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordRanch Wagon5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974FordTorino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974MercuryColony Park5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974MercuryCougar5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974MercuryMarquis5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974MercuryMontego5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1974MercuryMonterey5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordCountry Sedan5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordCountry Squire5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordCustom 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordGalaxie 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordGran Torino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordLTD5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordMustang5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordRanch Wagon5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973FordTorino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973MercuryColony Park5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973MercuryCougar5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973MercuryMarquis5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973MercuryMontego5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1973MercuryMonterey5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordCountry Sedan5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordCountry Squire5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordCustom5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordCustom 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordGalaxie 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordGran Torino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordLTD5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordMustang5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordRanch Wagon5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972FordTorino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972MercuryColony Park5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972MercuryCougar5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972MercuryMarquis5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972MercuryMontego5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1972MercuryMonterey5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordCountry Sedan5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordCountry Squire5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordCustom5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordCustom 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordGalaxie 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordLTD5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordMustang5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordRanch Wagon5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971FordTorino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971MercuryColony Park5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971MercuryCougar5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971MercuryCyclone5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971MercuryMarquis5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971MercuryMontego5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1971MercuryMonterey5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordCountry Sedan5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordCountry Squire5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordCustom5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordCustom 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordFairlane5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordFalcon5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordGalaxie 5005.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordLTD5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordMustang5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordRanch Wagon5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970FordTorino5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970MercuryColony Park5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970MercuryCougar5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970MercuryCyclone5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970MercuryMarquis5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970MercuryMontego5.8LV8Performance main bearing set with 3/4 grooves in standard size.
1970MercuryMonterey5.8LV8Performance main bearing set with 3/4 grooves in standard size.
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
MB5503XPMS1010H