can some one tell me whats the difference
 

Ok what is with these two products?
I dont know what to buy
http://www.rpmoutlet.com/musv6asp.htm

or

http://www.stangmods.com/ASP-Underdr...227-820117.htm

Doesn't look like ASP comes with the water pump pulley and it's more expensive?

ASP Crank Pulley and belt $229
Motoblue Crank pulley, water pump pulley and belt $190

seems like a no brainer but I'd call and ask about each. For that price, they both should include a new balancer and should not be "piggyback" style crank pulleys. but it's hard to tell from the description.

Search around for used ones bro they are all over for sale sections on v6 sites and eBay.
If you want new i would go with the cheaper one.

Pullies put more stress on your alternator, and make your engine run hotter because of the pulley on the water pump. This can lead to seizing of one or both of these. I wouldnt run pullies for the 5hp they give you.