Breathe Deep
Once again because this head is a prototype, the exhaust ports are a D-port configuration on the left and round port on the right. You will get to choose which you want when you order your heads. The exhaust bolt pattern will also be reconfigured for easier access with D-port headers. A Tiger D-port measures 1.900x1.300 inches and the factory #48 is 1.700x1.100 inches. Tiger's round ports are 1.875 inches across and the Ram Air IVs are 1.800.
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