Well, I can't comment on worth, but I can say I bought a car with a Set of the TF Street Heat Heads. They have been on the car since the Heads were first made.
They have been great to work with and make allot of power. I was running autolites 63 in the Heads with 10.5 to 1 compression and now I am running the autolite 51 because my compression went up to 12.5 to 1.
So anyway, great heads, allot to work with and has helped my car get into the 10's (all motor) and there is more there.
-James
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