Of the two blowers,go with the Vortech.
I bought the Paxton kit that Summit sells for around $2000,it's the Paxton GSS blower.
I went with the Paxton blower because I wanted to be different

My kit had everything that was needed for the install.You may have to call them and ask them if everything comes with the Vortech kit. I know the Vortech HO kit(which is more money) includes everything needed for installation.
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Paxton Blown 87GT
ICQ#91504337