I'm about to install the vortech system finally, my only concern is I need to replace the udp, I currently have the one from unorthodox that definitely needs to be replaced.
Is it worth replacing it with the KJR or CNR lightweight pulley or should stock be sufficient.

 

stock is sufficient

 

Go with stock, unless your going after more boost and are concernred/have belt slippage issues - then I would go for an overdrive crank pulley.

Rick

 

Stay away from the after market pulleys . To many problems have come up with people using them . The only pulley I would go with on a SC is [ and I have one ] is a ATI fuid damper or simular