Home / Shop / Clevite AL-Series Main Bearings MS-909A-30 Bearings, AL-Series, 1/2 Groove, .030 in. Crankshaft Undersize, AL-5, Chevrolet, Small Block, Set of 5

Clevite AL-Series Main Bearings MS-909A-30 Bearings, AL-Series, 1/2 Groove, .030 in. Crankshaft Undersize, AL-5, Chevrolet, Small Block, Set of 5

SKU: CLEMS-909A-30

Main Bearings

Clevite

Clevite AL-Series Main Bearings MS-909A-30 Bearings, AL-Series, 1/2 Groove, .030 in. Crankshaft Undersize, AL-5, Chevrolet, Small Block, Set of 5

SKU: CLEMS-909A-30

Main Bearings

BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.

We accept

Description

For some engines, the softer and more conformable nature of aluminum is preferable to the stiffer characteristics of the steel backings used for many bearings. Clevite AL-Series main bearings offer the features found in OE-type aluminum bearings, combined with the distinct advantages of proven Clevite know-how. That includes things such as carefully chosen eccentricities tailored to the application, and that means solid, reliable performance.

Clevite AL-Series main bearings are a great choice for anything from OEM-style rebuilds to mild performance applications. Clevite recommends these main bearings for most engines using a cast crankshaft.

Part Type

Main Bearings

Data: v4.2 - Upd: 2026-10-14 10:30:11

Specifications

Product Attributes - Brand: Clevite Engine Parts
Product Attributes - Manufacturer's Part Number: MS-909A-30
Product Attributes - Part Type: Main Bearings
Product Attributes - Product Line: Clevite AL-Series Main Bearings
Product Attributes - UPC: 27067366894
Product Attributes - Bearing Usage: Direct replacement
Product Attributes - Engine Crankshaft Undersize (in.): 0.030 in.
Product Attributes - Engine Crankshaft Undersize (mm): 0.75mm
Product Attributes - Grooved Bearing: Yes
Product Attributes - Groove Location: Upper
Product Attributes - Groove Style: 1/2
Product Attributes - Thrust Bearing Oversize: Stock
Product Attributes - Bearing Material: AL-5
Product Attributes - Quantity: Sold as a set of 5.

Reference Information

Brand Name/s	Clevite
StreetFX SKU	cleMS-909A-30
SFX Item ID	4884120
Supplier Item Code	4884120
Manufacturer SKU	MS-909A-30
Manufacturer UPC	27067366894
Alternative References	AL-5

Compatibility

Application Data

Make	BUICK
Model	SKYLARK
Submodel	ESTATE WAGON
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Engine Version: Chevrolet. Material Grade: OE Replacement Series: A Series (Aluminum) Size: .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	ESTATE WAGON
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Column1 OE Replacement Column2 A Series (Aluminum) Column3 .030in Undersize Column13 Domestic Column20 93-68 GMC 4.9L-5.7L
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	LIMITED COLLECTOR'S EDITION
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Engine Version: Chevrolet. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	LIMITED COLLECTOR'S EDITION
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Engine Version: Chevrolet. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	LIMITED COLLECTOR'S EDITION
Beginning Year	1979
Ending Year	1991
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	LIMITED COLLECTOR'S EDITION
Beginning Year	1979
Ending Year	1991
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	LIMITED COLLECTOR'S EDITION
Beginning Year	1979
Ending Year	1991
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	LIMITED COLLECTOR'S EDITION
Beginning Year	1979
Ending Year	1991
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1979
Ending Year	1996
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade: OE Replacement Series: A Series (Aluminum) Size: .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1996
Ending Year	1996
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	P

Make	BUICK
Model	SKYLARK
Submodel	SPORT
Beginning Year	1996
Ending Year	1996
Engine Type	V8
Liter	5.0
CID	305
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.0L/305
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	P

Make	BUICK
Model	SKYLARK
Submodel	SPORT
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen I
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	7

Make	BUICK
Model	SKYLARK
Submodel	SPORT
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen I
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	7

Make	BUICK
Model	SKYLARK
Submodel	SPORT
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	7

Make	BUICK
Model	SKYLARK
Submodel	SPORT
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	7

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: FI. Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	7

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	OE Replacement A Series (Aluminum) .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1992
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1994
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1979
Ending Year	1993
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1979
Ending Year	1995
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade OE Replacement Series A Series (Aluminum) Size .030" Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	S
Beginning Year	1979
Ending Year	1979
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Material Grade OE Replacement Series A Series (Aluminum) Size .030in Undersize
Engine VIN Code	G

Make	BUICK
Model	SKYLARK
Submodel	ESTATE WAGON
Beginning Year	1994
Ending Year	1979
Engine Type	V8
Liter	5.7
CID	350
Engine Family	Chevy small block Gen II (LT-based engines)
Engine Size	5.7L/350
Application Notes	Engine Version: Chevrolet, Fuel Deliver Type: CARB. Material Grade: OE Replacement Series: A Series (Aluminum) Size: .030" Undersize
Engine VIN Code	P