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Sealed Power Competition Series Main Bearings 139M11

Main Bearings, Competition, 0.011 in. Undersize, Tri Metal, 3/4 Groove, Chevy, 302, 305, 350, Set of 5

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  • This part is normally shipped directly from the manufacturer / Supplier.

Estimated Ship Date: 9/23/2014 (if ordered today) Would you rather pick it up? Select Location

Brand: Speed Pro
Manufacturer's Part Number: 139M11
Part Type: Main Bearings
Summit Racing Part Number: SLP-139M11

UPC: 724956275380
Bearing Usage: Performance
Grooved Bearing: Yes
Groove Location: Upper and lower
Groove Style: 3/4
Bearing Material: Tri-metal copper-lead alloy
Quantity: Sold as a set of 5.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

If you're building a serious competition engine, then you'll definitely want to check out Sealed Power Competition series main bearings. They were developed in NASCAR and Pro Stock competition, so you know they're tough. They're built on premium 1020AK steel backings and overlaid with Sealed Power's super-duty H-14 alloy. That's 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. Sealed Power's engineers have determined that such a layer can actually move around under high loads--sometimes with undesirable consequences. These bearings have 3/4 oil grooves for enhanced lubrication, while maintaining a maximum bearing surface area. They also feature Sealed Power's exclusive contoured-flange thrust bearing technology for higher thrust-loading capacity.

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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