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View Full Version : How much does the Version 8 JDM heads flow? breathinez 03-13-2007, 01:54 PM Looks like I might be able to get some slightly used JDM v8big port heads for a good price. And I was just curious as to what they might flow. The reason being is that I was going to have a pnp job done to my 2.0 heads and was wanting to see the difference. blueflu 03-13-2007, 02:44 PM It depends on the style of head, some of the jdm heads have the same size valves but bigger ports than the usdm sti heads, others have bigger valves and ports so they would flow alot more! Reguardless Any jdm head is going to be a huge gain in flow over the stock wrx heads! DigitalPunk 03-13-2007, 03:36 PM |---------| this much breathinez 03-13-2007, 03:42 PM |---------| this much Good answer, pretiate it:rolleyes: |