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The Hemi chambers boast dual quench pads, which promote combustion efficiency and a quicker burn rate. The proof is in the pudding, as the TME heads required just 28 degrees of total ignition advance. A key benefit of a Hemi head is that it positions the intake and exhaust valves at opposite sides of chamber, freeing up space for massive 2.450/1.900-inch valves. This also means that the valves move closer to the bore centerline as they open, instead of shrouding up against the cylinder wall as in a Wedge head. View Related Article
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