Not Ranked
The initial production runs of the Kaase Boss 9 heads will be very small until he is completely satisfied with the product, so they will be scarce into the summer. The reference to being a street head is to eliminate any confusion with the hemi heads used on his 1600 hp Pro Stock engines - however, they are nothing like an Edelbrock Performer. So far they appear to have great potential and are at the upper limit of width for a Cobra.
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