Thread: Topgunz full supercharger kits!!
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Old 06-03-2018, 10:53 AM   #119 (permalink)
cupcakez
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Originally Posted by TopgunZ View Post
My kit ships with the upgraded Si trim impeller. These kits make 11 psi out of the box.
Is the Si Trim impeller better, similar, or worse than the 928 impeller?
Anyone know? or have ideas?
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