Check out the Trick Flow R series heads. I think u will find that they are comparable to the afr 225s and they dont give up much if any bottom end. They flow great numbers at both low lifts and high lifts. Out flow the afr actually in the lower lifts and are pretty much the same in the top. Beings they flow better at lower lifts this also means they runners have more velocity which is what makes low end torque and throttle response. Check out the website. www.trickflow.com
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