STI HEADS V3/ V4

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25 October 2018, 09:50 AM

kenc

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STI HEADS V3/ V4

Are Version 3 and version 4 STI heads the exact same?? As in Cams, valves, buckets, head cc????

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27 October 2018, 12:57 PM

stockcar

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pretty much identical although i do have a slight niggle about there being a difference in the cam spec.................

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27 October 2018, 01:49 PM

Broxi

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V3 Cams are considered better than V4, but the rest is the same. castings may vary slightly but that's the casting and not intentional changes.

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