Speed-Pro Competition Series Main Bearings

4.14 out of 5 stars 63 Customer Reviews

If you're building a serious performance engine, then you'll want to consider Speed-Pro Competition Series main bearings. They were developed in NASCAR and Pro Stoc

If you're building a serious performance engine, then you'll want to consider Speed-Pro Competition Series main bearings. They were developed in NASCAR and Pro Stock competition, so you know they're tough. The bearings are built on premium 1020AK steel backings and overlaid with Speed-Pro's super-duty H-14 alloy. That layer is then covered with a nickel barrier, followed by a thin lead-tin-copper overplate. However, unlike other performance bearings, there is no flash tin layer on top of that. Speed-Pro's engineers have determined that such a layer can actually move around under high loads—sometimes with undesirable consequences. Depending on the application, these main bearings have oil grooves for enhanced lubrication, while maintaining a maximum bearing surface area. They also feature Speed-Pro's exclusive contoured-flange thrust bearing technology for higher thrust-loading capacity. Competition Series main bearings are available in nearly a hundred configurations for countless vehicle and engine applications.

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Results 1 - 16 of 16

Speed-Pro Competition Series Main Bearings 113M

Main Bearings, Competition Series, Standard Size, Super Duty Alloy, H-14, 3/4 Groove, Pontiac, 350, 389, 400, Set of 5

Part Number: SLP-113M

4.0 out of 5 stars ( 4 )

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Speed-Pro Competition Series Main Bearings 119M10

Main Bearings, Comp., 0.010 in. Crankshaft Undersize, Super Duty Alloy, H-14, 3/4 Groove, Mopar, 426 (Wedge Only), 440, Set of 5

Part Number: SLP-119M10

5.0 out of 5 stars ( 5 )

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Speed-Pro Competition Series Main Bearings 152M

Main Bearings, Competition Series, Standard Size, Super Duty Alloy, 3/4 Groove, Chevy, LS, Set of 5

Part Number: SLP-152M

Not Yet Reviewed

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Speed-Pro Competition Series Main Bearings 119M

Main Bearings, Competition, Standard Size, Super Duty Alloy, H-14, 3/4 Groove, Mopar, 426 (Wedge Only), 440, Set of 5

Part Number: SLP-119M

1.0 out of 5 stars ( 1 )

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Speed-Pro Competition Series Main Bearings 157M10

Main Bearings, Competition Series, 0.010 in. Crankshaft Undersize, Tri Metal, 3/4 Groove, Buick, 455, Set of 5

Part Number: SLP-157M10

4.0 out of 5 stars ( 1 )

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Speed-Pro Competition Series Main Bearings 108M

Main Bearings, Competition Series, Standard Size, Super Duty Alloy, H-14 Tri-Metal Copper-Lead Alloy, 3/4 Groove, Oldsmobile, 400, 425, 455, Set of 5

Part Number: SLP-108M

5.0 out of 5 stars ( 1 )

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Speed-Pro Competition Series Main Bearings 152M1X

Main Bearings, Competition, 0.001 in. Oversize, .001 extra clearance Super Duty Alloy, 3/4 Groove, Chevy, Pontiac, 5.7L, Set of 5

Part Number: SLP-152M1X

5.0 out of 5 stars ( 1 )

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Speed-Pro Competition Series Main Bearings 108M10

Main Bearings, Competition, 0.010 in. Crankshaft Undersize, Super Duty Alloy, H-14, 1/2 Groove, Oldsmobile, 400, 425, 455, Set of 5

Part Number: SLP-108M10

Not Yet Reviewed

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Speed-Pro Competition Series Main Bearings 113M20

Main Bearings, Competition, 0.020 in. Crankshaft Undersize, Super Duty Alloy, H-14, 3/4 Groove, Pontiac, 350, 389, 400, Set of 5

Part Number: SLP-113M20

Not Yet Reviewed

Estimated Ship Date: Nov 20, 2025 if ordered today

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Estimated Ship Date: Nov 20, 2025 if ordered today

Speed-Pro Competition Series Main Bearings 141M10

Main Bearings, Competition Series, 0.010 Crankshaft Undersize, Tri Metal, 3/4 Groove, Chevy, 7.4L, Set of 5

Part Number: SLP-141M10

Not Yet Reviewed

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Speed-Pro Competition Series Main Bearings 152M10

Main Bearings, Competition, 0.010 in. Crankshaft Undersize, Super Duty Alloy, 3/4 Groove, Chevy, Pontiac, 5.7L, Set of 5

Part Number: SLP-152M10

Not Yet Reviewed

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Speed-Pro Competition Series Main Bearings 4664M

Main Bearing Set;

Part Number: SLP-4664M

4.0 out of 5 stars ( 1 )

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Speed-Pro Competition Series Main Bearings 152M1

Main Bearings, Competition, 0.001 in. Crankshaft Undersize, Super Duty Alloy, 3/4 Groove, Chevy, Pontiac, 5.7L, Set of 5

Part Number: SLP-152M1

Not Yet Reviewed

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Speed-Pro Competition Series Main Bearings 4418M10

Main Bearings, Competition Series, 0.010 in. Crankshaft Undersize, Tri Metal, 1/2 Groove, Buick, 340, 350, Set of 5

Part Number: SLP-4418M10

Not Yet Reviewed

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Speed-Pro Competition Series Main Bearings 7211M20

Main Bearings, 0.020 in. Crankshaft Undersize, Tri Metal, 1/2 Groove, Jeep, L6, 4.0L, Set

Part Number: SLP-7211M20

Not Yet Reviewed

Estimated Ship Date: Nov 24, 2025 if ordered today

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Estimated Ship Date: Nov 24, 2025 if ordered today

Speed-Pro Competition Series Main Bearings for 1992-2002 VIPER - 156M

Main Bearings, Competition Series, Standard Size, Tri Metal, 3/4 Groove, Dodge, V10, 8.0L, Set of 6

Part Number: SLP-156M

Not Yet Reviewed

Estimated Ship Date: Nov 24, 2025 if ordered today

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Estimated Ship Date: Nov 24, 2025 if ordered today

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