I have a HVH 1 inch Super sucker all CNC machined aluminum carb spacer. It has 4 holes on top and then the underside has a special cnc machined shape that allows smoother airflow out of the bottom of the carb and gives more flow and a stronger carb signal for better power down low and up high. These are proven power makers. We went to a taller one since we have a 4 inch cowl hood. This is the 1 inch thick all cnc machined aluminum version. It sells for $125+, but I will take the first $65 for it. I have pics if you send me your e-mail address. contact me at aarongardner@verizon.net or 419-965-2856 I am set up for paypal also.