Hey yall! Im new here,,,,i own a 1999 grand prix gtp 2dr;

I've been driving without my supercharger belt on for about a month and a half since it ripped off (i just purchased the car this past november, probably a really old belt)...anyways i've been looking at several forums on the web and can't find what i need. My car has the original pulley,,,,and i need someone to gracefully point me in the right direction of a perfect-fit belt that'd last me for a long time, hopefully. Also, instructions on installation would be very helpfull.

Thanx in Advance! :smile:

Just replace the XXX with the indicated belt size and you should get your number.

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


No IC
Grand Prix
3.8 (Stock): 665
3.2-3.5: 660
2.85-3.1: 650
2.7-2.85: 642

Bonneville
Stock: 721
3.4: 716


With ZZP Stage 2 IC (2.25” tall 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+


Other Belts

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.