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Any opinions on Trick Flow "High Port" cylinder heads? These are the original "Street Heat" heads. My concerns are how well built these heads are (ex. valve seats and guides). I will buy bare castings and add my other parts. I understand that they have patented valve spacing and raised exhaust ports. How do these compare to AFR 185's? I see that the TF's flow a bit more than the AFR's. Thanks for your help.
 

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Maybe it's just my eyes but it looks like the AFRs match or best the Hi-Ports....hmmm... Go with the Hi-Ports

Air Flow Research 185s (right from the website)
0.200" 129 118
0.300" 189 153
0.400" 234 178
0.500" 267 185
0.600" 277 191

Trick Flow Hi-Port (from the website)
0.200" 133 103
0.300" 186 138
0.400" 230 166
0.500" 257 183
0.600" 267 193
 

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The difference is very small and it's cheaper to make up for the few HP you lose by going slightly bigger with the cam or rocker ratio. Are 5-10 more HP worth $350 more dollars? Only if money is no object and your running in a heads up class where every fraction of a seconds means winning or losing.
 

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The AFR's come already ported. The Hi-Ports just come as-cast.

There is a lot of potential with the Hi-Ports. They were THE head back in their day before TFS got bought out by Summit. They came out with the Twisted Wedge and killed off the old Hi-Ports.

Good Luck!
 

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The "street heat" heads are not very common anymore. When they came out they were the #1 head on the market. I think the heads that are on the market now flow better than the TFS heads. I used a set on a 351W a long time ago and had no problems with them at all. I actually still have a set of bare cast iron "Street Heat" heads that have never been assembled or anything. I bought 2 sets about 10 yrs ago and 1 set has been sitting in my garage since.
 

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One concern you might consider in your selection is finding off the shelf headers that fit for the Trick Flows, unless of course money isn't an issue. I've got a set of these heads on my 351w in a '67 mustang and I couldn't find affordable headers---ended up drastically modifying a set of 1 3/4" swap Hookers. Also, with the exhaust ports so high, I've had some header flange to valve cover clearance issues even using double gaskets.
 

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The "street heat" heads are not very common anymore. When they came out they were the #1 head on the market. I think the heads that are on the market now flow better than the TFS heads. I used a set on a 351W a long time ago and had no problems with them at all. I actually still have a set of bare cast iron "Street Heat" heads that have never been assembled or anything. I bought 2 sets about 10 yrs ago and 1 set has been sitting in my garage since.
Hi I know this is a very old post. But would you still have or know anyone that would have a pair of or just one Trickflow SBF castiron 170 high port cylinder heads. Thanks Ken 226 230 1729
 
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