Thread: Engine pulley list and belt size chart

This guide works for 96-03 Bonneville, 96-?? Riviera, 97.5-04 Regal, 97-07 Grand Prix, bascially any year with the Series II or Series III 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.


Sigature way to find threads Easy

so do gen v's need a diff belt than a gen 3?cuz im swappin to a gen v in the spring

the pulley is in the same place, the only question is..what size pulley. The chart should work fine for 3 or 5

ok i was jw bcuz i didnt know for sure if i needed to go to a little bit biger since the gen v is slightly bigger but not by much. and ima be goin for between 3.4-3.2. w.e. the smallest i cant run without knock lol.on a xp. So as i see it i need the 660?

Sounds about right. The Gen V is really only bigger in length, not height.

BILL ITS IN MAH SAFELY MODDING THREAD.

But thanks

lol you know no one reads that anymore nick lol people just throw 3.4's on there stock car and make it gooo vrrom vrrom..... boom

but bill this thread is great help and ya did a dam good job

i've done tons of write ups etc as people needed them. Blue..I wasn't trying to step on your toes or anything. But I was already modded before joining up here. Way too late to play it safe for me.

I know man...I was just poking fun...

emphasis on the poke LOL

I never wanna be poked by a dude..lol

which pulleys will I need to get for a topswap??

whats the part number for 6?
thanks for the help

this is an old thread...

do u still want those fuel rails?

yea but I didnt see the point in making a new thread when this relevant to what I need to find out.

No I dont thanks for the offer though!

never mind i was confused, the main drive is the balancer and I got one of those already

never mind i was confused, the main drive is the balancer and I got one of those already

Cool...that question is better suited in a new thread by you.