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A holset hx40 with a 16cm housing is gonna spool super quick(like off idle) but it gonna choke it out up top(above 5000rpm), a 19cm housing will be a little laggier but pull all the way to 8500 and should make around 550-600whp. If I remember correctly the H1C is a size in between the hx35 and the hx40. The hx35 comes off a cummins diesel in the 90's dodge trucks, the hx40 comes off a bus.
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