OE Replacement A Series (Aluminum) .030in Undersize
OE Replacement A Series (Aluminum) .040in Undersize
OE Replacement A Series (Aluminum) Standard
OE Replacement A Series (Aluminum) .010in Undersize
OE Replacement A Series (Aluminum) .020in Undersize
OE Replacement A Series (Aluminum) Standard
OE Replacement A Series (Aluminum) .25mm Undersize
OE Replacement A Series (Aluminum) Standard
OE Replacement A Series (Aluminum) .030in Undersize
OE Replacement A Series (Aluminum) .50mm Undersize
OE Replacement A Series (Aluminum) .001in Undersize
OE Replacement A Series (Aluminum) Standard
OE Replacement A Series (Aluminum) .020in Undersize
OE Replacement A Series (Aluminum) .010in Undersize
OE Replacement A Series (Aluminum) .25mm Undersize
OE Replacement A Series (Aluminum) .001in Undersize
bimetal (aluminum silicon base) Crankshaft Undersize-001in Flange STD+001in
bimetal (aluminum silicon base) Crankshaft Undersize-040in Flange STD+001in
bimetal (aluminum silicon base) Crankshaft Undersize-010in Flange STD+001in
bimetal (aluminum silicon base) Crankshaft Undersize-030in Flange STD+001in
bimetal (aluminum silicon base) Crankshaft Undersize-020in Flange STD+001in
bimetal (aluminum silicon base) STD Flange STD
OE Replacement A Series (Aluminum) Standard
OE Replacement A Series (Aluminum) .020in Undersize
OE Replacement A Series (Aluminum) .010in Undersize
OE Replacement A Series (Aluminum) .030in Undersize
OE Replacement P Series (Tri-Metal) .002in Undersize
Standard Design Overplated Copper-Lead Alloy Standard
Standard Design A-Series Aluminum Bearings Standard
OE Replacement A Series (Aluminum) .50mm Undersize
OE Replacement P Series (Tri-Metal) .020in Undersize
OE Replacement A Series (Aluminum) .030in Undersize
OE Replacement A Series (Aluminum) .020in Undersize
OE Replacement A Series (Aluminum) Standard
with 3/4 Grooves A-Series Aluminum Bearings Standard
A-Series Aluminum Bearings Standard
2.4937 (in) to 2.4946 (in) Shaft Size without Groove A-Series Aluminum Bearings Standard
Optional MB 509SI Race Bearings alecular (racing line) STD Flange STD
OE Replacement P Series (Tri-Metal) .040in Undersize
OE Replacement P Series (Tri-Metal) Standard
OE Replacement P Series (Tri-Metal) .001in Undersize
OE Replacement P Series (Tri-Metal) .020in Undersize
OE Replacement P Series (Tri-Metal) .010in Undersize
OE Replacement A Series (Aluminum) .010in Undersize
OE Replacement P Series (Tri-Metal) .030in Undersize
OE Replacement P Series (Tri-Metal) Standard
OE Replacement P Series (Tri-Metal) .020in Undersize
Optional MB 509SI Race Bearings Race bearings, Trimetal [pMax Black] STD Flange STD
Flange STD Crankshaft Undersize-010in alecular (racing line) Optional MB 509SI Race Bearings
Optional MB 509SI Race Bearings alecular (racing line) STDX Flange STD
Flange STD Crankshaft Undersize-020in alecular (racing line) Optional MB 509SI Race Bearings
Flange STD Crankshaft Undersize-010in Race bearings, Trimetal [pMax Black] Optional MB 509SI Race Bearings
Optional MB 509SI Race Bearings Race bearings, Trimetal [pMax Black] STDX Flange STD
A-Series Aluminum Bearings Standard
OE Replacement P Series (Tri-Metal) .020in Undersize
Flange STD Crankshaft Undersize-030in alecular (racing line) Optional MB 509SI Race Bearings
Flange STD Crankshaft Undersize-021in alecular (racing line) Optional MB 509SI Race Bearings
Optional MB 509SI Race Bearings alecular (racing line) Crankshaft Undersize-001in Flange STD
Optional MB 509SI Race Bearings Race bearings, Trimetal [pMax Black] Crankshaft Undersize-020in Flange STD
Flange STD Crankshaft Undersize-010Xin Race bearings, Trimetal [pMax Black] Optional MB 509SI Race Bearings
Flange STD Crankshaft Undersize-001in Race bearings, Trimetal [pMax Black] Optional MB 509SI Race Bearings
A-Series Aluminum Bearings Standard
OE Replacement P Series (Tri-Metal) .020in Undersize
Set Per Journal
OE Replacement P Series (Tri-Metal) .010in Undersize
OE Replacement P Series (Tri-Metal) .010in Undersize
High Performance H Series (Tri-Metal) .021in Undersize
OE Replacement P Series (Tri-Metal) .030in Undersize Contains Full Grooved Bearings
OE Replacement P Series (Tri-Metal) .010in Undersize
High Performance H Series (Tri-Metal) Standard
3.824 (in) Maximum Flange Outside Diameter Overplated Copper-Lead Alloy Standard
OE Replacement P Series (Tri-Metal) .030in Undersize
OE Replacement P Series (Tri-Metal) .010in Undersize Contains Partial Grooved Main Bearings
OE Replacement P Series (Tri-Metal) .010in Undersize
High Performance H Series (Tri-Metal) .010in Undersize
High Performance H Series (Tri-Metal) .009in Undersize
OE Replacement P Series (Tri-Metal) Standard
OE Replacement P Series (Tri-Metal) Standard
High Performance H Series (Tri-Metal) .001in Undersize
High Performance H Series (Tri-Metal) .001in Undersize C - Coated
High Performance H Series (Tri-Metal) Standard X - .001in Extra Oil Clearance
High Performance H Series (Tri-Metal) .030in Undersize
Optional MB 509SI Race Bearings pmaxkote (racing line), polymer coated STD Flange STD
OE Replacement A Series (Aluminum) .010in Undersize .020in Oversize Housing Bore
High Performance H Series (Tri-Metal) .020in Undersize
A-Series Aluminum Bearings Standard
OE Replacement P Series (Tri-Metal) .010in Undersize Contains Full Grooved Bearings
OE Replacement P Series (Tri-Metal) .020in Undersize Contains Partial Grooved Main Bearings
Optional MB 509SI Spacer set for use of Chevy 350 crank in 400 small block. To use with Chevy 350 main bearing (MB 557SI) bimetal (aluminum base) STD
OE Replacement P Series (Tri-Metal) .020in Undersize
OE Replacement P Series (Tri-Metal) Standard
OE Replacement P Series (Tri-Metal) Standard
OE Replacement P Series (Tri-Metal) Standard
OE Replacement P Series (Tri-Metal) .030in Undersize
Optional MB 509SI Race Bearings pmaxkote (racing line), polymer coated Crankshaft Undersize-001in Flange STD
Optional MB 509SI Race Bearings pmaxkote (racing line), polymer coated STDX Flange STD
Optional MB 509SI Race Bearings pmaxkote (racing line), polymer coated Crankshaft Undersize-010in Flange STD
OE Replacement P Series (Tri-Metal) Standard Contains Full Grooved Bearings
OE Replacement P Series (Tri-Metal) .020in Undersize
High Performance H Series (Tri-Metal) Standard
High Performance H Series (Tri-Metal) Standard XC - .001in Extra Oil Clearance / Coated
High Performance H Series (Tri-Metal) Standard X - .001in Extra Oil Clearance Position Numbers 4 and 5 Are Full Grooved
High Performance H Series (Tri-Metal) .001in Undersize
High Performance H Series (Tri-Metal) Standard XC - .001in Extra Oil Clearance / Coated
High Performance H Series (Tri-Metal) .010in Undersize
High Performance H Series (Tri-Metal) Standard X - .001in Extra Oil Clearance
High Performance H Series (Tri-Metal) .010in Undersize C - Coated
OE Replacement P Series (Tri-Metal) Standard Contains Partial Grooved Main Bearings
OE Replacement P Series (Tri-Metal) .010in Undersize
High Performance H Series (Tri-Metal) Standard C - Coated
OE Replacement P Series (Tri-Metal) .020in Undersize Contains Full Grooved Bearings
High Performance Standard
OE Replacement P Series (Tri-Metal) Standard
Browse our selection of quality engine crankshaft main bearing set parts designed specifically for your Pontiac Firebird. We carry options across multiple trim levels, body styles, and engine configurations to ensure a perfect fit.
326 · 350 · 350 HO · 400 · Base · Esprit · Formula · HO · S/E · Sprint · Trans Am · Trans Am GT · Trans Am GTA · Trans Am GTA SE
Convertible · Coupe
L4 2.5L · L6 3.8L · L6 4.1L · V6 2.8L · V6 3.1L · V6 3.4L · V6 3.8L · V8 4.3L · V8 4.4L · V8 4.9L · V8 5.0L · V8 5.3L · V8 5.7L · V8 6.6L · V8 7.5L
Automatic · Manual · U/K