Engine Pulley/Belt Size List

[bluegtp91]

Per Billboost:

 

This guide works for '96-'03 Bonneville's, L67 Riviera's, '97.5-'04 Regal's, '97-'08 Grand Prix, or basically any year WBody with the Series II or Series III 3800 motor.

 

Part Number Examples
Napa/Gates: 060XXX
Goodyear: 4060XXX
Dayco: 5060XXX
Duralast: XXXK6
 

 

Regal/Grand Prix/Monte Carlo/Impala - No IC
3.8 (Stock): 665
3.2-3.5: 660
2.85-3.1: 650
2.7-2.85: 642

 

With 2.25†tall IC Core 6 Rib
3.3-3.8: 685
2.7-3.2: 680 (Note that the NAPA 680 may be too long for 2.8" and smaller. Try a NAPA 672)
2.5-2.6: 672

 

8 Rib NOTE: For these belts the part numbers are 080 rather than 060...or K8 with the Duralast rather than K6.
3.0-3.2: 685
2.6-2.9: 680

 

Gen 5 Blower
2.9-3.1: 685
2.7-3.0: 680
2.4-2.6: 675
 

With ZZP Stage 3 IC (??? tall Core)
6 Rib:3.1-3.8: 685
2.6-3.0: 680

 

Gen 5 Blower
3.0-3.8: 685
2.6-2.9: 680
2.3-2.55: 675

 

Gen 5 Blower with ATI 10% overdrive balancer
2.8: 695
With ZZP SSIC (1†tall Core)
3.2-3.8: 670
3.0-3.1: 667 (Stock belt)
2.8: 660
With MAP IC (2.0†tall Core)
3.1-3.4: 680
2.8-3.0: 672
With WBS IC (1.91†tall Core)
No information currently. MAP IC belt reference would be close but the belts listed there will be a bit long for some applications with the WBS IC.
With Thrasher IC (2.5†tall Core)
2.8: 672
3.0: 680
ZZP SS M90 Conversion
k060970 - SS M90 for 97/98
K060950 - SS M90 for 99+
 

 

Bonneville/Riviera
Stock: 725
3.4: 715
With WBS Stage 3 2" Core
2.9: 725
 

 

Other Belts W body
060915 - Stock accessory belt for 99-03
-also works with either UD WP pulley or OD alt pulley but not both.
060905 - Stock Accessory belt for 04+
060923 - Accessory belt for 99+ with UD WP pulley and alt UD pulley.
4060935 - Stock accessory belt for 97/98 (94").
4060938 - Accessory belt for 97/98 with underdrive pulleys.