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I have a Unorthodox Racing under drive pulley available.

Included are a total of 4 belts.

Brand new Gates K040292 PS belt.
(This belt is recommended by Unorthodox but many people find it to small to fit).

Used 5040305 PS belt.
(This belt is the stock belt but fits the UDP as well).

Brand new Gates K060408 AC/Alt belt
(This belt is to be used with the UDP and AC).

Used Napa 25-060325 Alt belt
(This belt is to be used with the UDP and no AC compressor).

 

So this pulley is smaller than the stock diamater?

 

Yes it is, It wouldn't be the undedrive pulley if it was stock diameter.

 

just wanted to double check. I have been looking for the lightweight stock diameter one. Any problems with underdriving? do you have sub or anything else in your car?

 

You won't have any charging problems with this and you also won't find a stock size lightweight for 3.0..I've looked.
I would buy this if I were you.
That is all.

 

I have used them in the past with no issues. This one I removed from a car I purchased that I'm demodding. The previous owner had a 15" sub with no issues. The only reason you need a stock diameter pulley is for a supercharger.

Thanks for your input.

 

Look this is my stock size 3.0 UR pulley n the only thing is missing is the timing ring that's why i haven't installed it yet

 

I'm pretty sure what he was saying is the stock size is no longer produced.
They probably didn't sell very many of them so there hard to come by.

 

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