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Recent content by SteelBlueZR1

  1. S

    OBX catback exhaust

    ZR1 exhaust 28+ up on dyno I concur, however there is an article on this website where a ZR1 c4 picks up 18 HP with just a Flowmaster exhaust and reaches +28hp from stock exhaust with custom mufflers and pipes. As you know the 90-91 exh resonator is a big restriction in the stock exhaust; I...
  2. S

    OBX catback exhaust

    1991 Corvette with OBX Exhaust and chip dynos 340 I too am considering the OBX exhaust after this weekends ZR1 Net Wazoo dyno pull day. My stock 1991 6k mile ZR1 pulled 321 hp with just a chip and K&N/open airbox. Right before that another member's 1991 ZR1 with chip and OBX Exhaust pulled 340...
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