More Information for MAHLE / CLEVITE MS2258A

{Alternate Inventory Numbers: MS-2258A-25MM, MS-2258A, MS-2258A-.25MM, MS2258A.25MM, MS2258A50MM}

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MAHLE / CLEVITE MS2258A

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Set; A Series (Aluminum)

As more and more OE manufacturers shift to aluminum bearings in OE engines, Clevite has introduced a line of A-Series engine bearings designed to be the highest quality replacement bearings in the industry. Clevite BiMetal� engine bearings carry on the tradition and reputation that Clevite has built throughout the course of time.

Clevite BiMetal engine bearings feature a 100% lead free aluminum-silicon bi-metal material; this includes 60% more silicon than leading competitor's bi-metal material for better conditioning of journal surfaces. These BiMetal bearings also offer greater wear resistance than leading competitor's bi-metal material, as well as greater seizure resistance than the leading competitor. Clevite BiMetal bearings feature 100% bored ID's for precision and surface characteristics and where appropriate - straight shell main bearings utilizing an "umbrella" groove that allows for superior oil control and improved pressure. Widely used at the OEM level in the past 15 years, bi-metal bearings are a very good choice for stock replacement parts on engines that have bi-metal bearings from the factory.

The letters at the end of each part number indicate a specific feature of the part.

Example:

Part #CB1234HXNK: H = High Performance, X = .001" more oil clearance than standard, N = Narrowed for greater crankshaft fillet clearance, K = TriArmor� coating applied to the bearing surface.

Letters & Their Meanings
A Steel backed lead free aluminum silicon alloy bearings without overlay. Standard replacement material.	M Steel backed bearings with a Micro-Babbitt lining (a very thin layer of lining which reduces the microscopic deflections that occur to a bearing when loaded and thus increases fatigue life). Solely intended for extreme high-horsepower applications.
AL Solid cast aluminum alloy bearings (material designation AL-1) or steel backed bearings with an aluminum alloy lining material designation AL-3, AL-4, AL-5, AL-6). Standard replacement material.	N Narrowed for greater crankshaft fillet clearance.
B Steel backed bearings with a conventional babbit lining.	P Steel backed bearings with an intermediate layer of copper-lead alloy and an electroplated lead-tin-copper overlay. Standard replacement material.
C Steel backed bearings with a copper-lead lining.	R Indicates that the bearing can be resized to standard. When following a camshaft bearing, indicates that it has extra bore stock in the inside diameter.
D Bearing has dowel hole.	S Indicates a set number designation.
G Steel backed bearings with a matrix of copper and an infiltrant of lead-tin babbitt. Precision undersizes are not resizable.	V High performance bearing with a lead-indium overlay (on main sets this indicates partial groove). Solely intended for extreme high-horsepower applications.
H High performance bearing (on main sets this indicates partial groove). Perform the same as "A" and "P" bearings, but have the ability to carry more load.	VG High performance bearing with a lead-indium overlay and a full annular groove. Solely intended for extreme high-horsepower applications.
HG High performance full annular grooved bearing. Perform the same as "A" and "P" bearings, but have the ability to carry more load.	X Bearing has .001� more oil clearance than standard.
HT High performance with indentless locating lug. �Full Bore� design. Perform the same as "A" and "P" bearings, but have the ability to carry more load.	XX Bearing has .002� more oil clearance than standard.
K TriArmor� coating applied to the bearing surface, which offers extraordinary protection and lubricity. Enhanced wear characteristics increase bearing life in race engines and high performance street Engines.	W Indicates a part that is a thrust washer (may also be designated upper or lower).

Additional Resources

Engine Bearing Failure Analysis and Correction

OEM / Interchange Numbers: MS2258AL

MAHLE / CLEVITE Warranty Information:
12 Months