What model year are they talking about.
When one says ZR1, 1st thing folks think of is C4 LT-5
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556.2 rwhp / 544.5 torque on 93 pump gas
ALL MOTOR, hydraulic cam, 427 C5r Block MTI Z07 package,
Kooks 1 7/8 headers, FAST 90mm Intake and TB, through the mufflers
