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Belt help. ASP underdrive

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Old Apr 9, 2008 | 11:26 AM
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Default Belt help. ASP underdrive
I have a 99 LS1 and need part number for the serp belt. i have underdrive for
crank and alt. i did a search and nothing came up.

thanks
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Old Apr 9, 2008 | 11:30 AM
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Gates Belts K060760 and K040378
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Old Apr 9, 2008 | 03:27 PM
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Originally Posted by jlrz28
Gates Belts K060760 and K040378
Any chance you have the part nuber for the belt for the ASP crank only pulley?

*NOTE, I am still running the factory AC as well.

I have been looking everywhere for the belt size and also am drawing nothing.
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Old Apr 9, 2008 | 03:54 PM
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I just went to Amazon.com and bought mine

Accessory Belt = 755K6
A/C Belt = 378K4
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Old Apr 9, 2008 | 03:56 PM
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wait, is yours the 15% or 25%? Those belts are for the 25%
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Old Apr 9, 2008 | 04:09 PM
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Originally Posted by RealArmyMan
wait, is yours the 15% or 25%? Those belts are for the 25%
I haven't even ordered it yet, as when I do, I'd like to have a belt wating to go on with it that is the correct size. I thought the crank ASP pulley only came in one size, and it was just known as the "ASP crank pulley".
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Old Apr 9, 2008 | 04:14 PM
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Originally Posted by CALL911
Any chance you have the part nuber for the belt for the ASP crank only pulley?

*NOTE, I am still running the factory AC as well.

I have been looking everywhere for the belt size and also am drawing nothing.
There are two belts...one for the crank to AC and one for the PS, water pump and alternator to crank. The part numbers are for the ASP pulley that was purchased from MTI. I guess im confused what you are asking.
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Old Apr 9, 2008 | 04:42 PM
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Originally Posted by jlrz28
There are two belts...one for the crank to AC and one for the PS, water pump and alternator to crank. The part numbers are for the ASP pulley that was purchased from MTI. I guess im confused what you are asking.
I see what you are saying now. I guess specifically, are the belt part #'s you put up for a setup without the alternator pulley? I will just be getting the crank pulley, and not the alternator pulley, and then obviosly leaving my AC in.
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Old Apr 9, 2008 | 04:48 PM
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Oh ok, yes that is all stock pulleys except for the underdrive crankpulley.
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Old Apr 9, 2008 | 04:54 PM
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Originally Posted by CALL911
I haven't even ordered it yet, as when I do, I'd like to have a belt wating to go on with it that is the correct size. I thought the crank ASP pulley only came in one size, and it was just known as the "ASP crank pulley".
You may be right. I thought I remembered seeing a 15% ud pulley during my search. TSP carries the belts too
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Old Apr 9, 2008 | 05:25 PM
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Originally Posted by jlrz28
Oh ok, yes that is all stock pulleys except for the underdrive crankpulley.
Well I just need(ed) you to clarify, as the OP said he had an alternator pulley as well which would change the belt size from what I need with just the crank pulley and stock alternator pulley.

So are you saying your part numbers are for his setup or mine? Because they are two different combo's.
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Old Apr 19, 2008 | 05:08 AM
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TTT, i still need the part number for the Drive belt. UD crank and Alt.
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Old Apr 19, 2008 | 05:14 AM
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thunder racing has the part number listed below the pulley on its site

I run the 755K6. It will work with and without the asp alternator pulley and wont come off like the 760K6
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Old Apr 19, 2008 | 05:17 AM
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Originally Posted by james562
thunder racing has the part number listed below the pulley on its site

I run the 755K6. It will work with and without the asp alternator pulley and wont come off like the 760K6

Well i used k060760 and it squeeks like crazy
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