Pontiac Tiger Heads 48 D Port
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The Tiger head is compared with a #48 D-port. Since this is a prototype, each intake port was worked differently. The port on the far left has been cleaned up to as-sold condition. This is the port that we flow tested. The center ports are as-cast and the end port on the right has been mildly ported to further explore the head's potential. Intake port volume is 310 cc as compared to the stock #48's 170 cc. Note the intake bolt holes on production heads will be repositioned to provide better gasket clamping force when used with spacers. View Related Article
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