svtrich

since Im going to do a cam change.Im going to install a slp 25% underdrive balancer. but what what belt #s do I need
Rich

3holer

The #'s they recommend did not fit. At least the A/C for sure, it's too wide and long. Haven't tried the main belt as of yet but when I return from the parts store I'll let you know what I came up with. Apparently others have had this issue, however, I've not seen the EXACT part numbers they used to correct the problem.

timd38

Did you try this one?

Dayco #5060780

3holer

That is the main belt # that I have. Can I assume your using it with the SLP pulley with no issues?

timd38

I have not installed it yet. Still waiting for heads.....

Nightstalker Medic

New Serpentine Belt (NAPA 25-060770) with a 25% Underdrive Crank Pulley (ASP)

FloydSummerOf68

The belt # they provide for the AC is incorrect

The main serp belt # is correct

Stang's Bane

Anyone else have only one idler/tensioner pulley for the ac belt?

3holer

SLP UD pulley Main belt # ended up being 6PK1755, A/C belt was 4PK1010. Neither of the belts listed on the site were even remotely close. This was for a 2007 LS2.