Vintage Mustang Forums - View Single Post - Afr 165 heads or TF Twisted Wedge 170
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post #6 of (permalink) Old 07-02-2019, 10:07 PM
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Location: Sedgwick, Kansas
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Both heads are excellent. It's my belief that the chamber design is a little better on the AFR's compared to the TW's. While they are very comparable on the top end, with the TW's possibly even delivering a few more peak horsepower due to the canted valve design, I think the AFR average power would be a little better. The AFR's BSFC is better, too, which means better mileage.

So - for street use, I'd buy the AFR's. If you're more interested in racing, the TW design has slightly more potential for peak power - but not much.

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