Opening plenum on fact intake

Discussion in 'Race 400/430/455' started by J GLASGO, Aug 11, 2003.

  1. J GLASGO

    J GLASGO Well-Known Member

    Anybody modify their factory intake by cutting the dividers out,and opening up the plenum? Any results?
     
  2. rh455

    rh455 Well-Known Member

    When I ran Olds motors, I got one of the first Performer RPM's that came out. I cut a gap in the plenum about 1.5" long by about 1" deep. I ground the name off and blasted it and no one could identify the intake. It did give me more mid range and top end power. Never tried it on a stock intake.
     

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