Quote:
Originally Posted by Pro4Jackster
The Si impeller swap from Vortech is under $400. It gives you an extra 100 cfm. In my case it was a 3-4 psi increase.
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I had the Si impeller upgrade done by Vortech as well ... had 30,000 miles on the SC'r and it needed to be rebuilt once they evaluated it.
Cost skyrocketed past the $1,000 mark.
It did make 11.9 lbs of boost with the 9 lb. pulley