These valves are 1MM larger than stock, great for ported heads that need more flow through the valves. These stainless steel valves are lighter than the stock steel valves, and have a special anti-friction coating to promote better airflow across the valve as well as reduced resistance in the guide, resulting in better valvetrain stability. These valves will work with the stock seats once a performance valve job has been performed. It is highly recommended to unshroud the valve with bowl and chamber port work when using oversized valves. Sold individually
Other parts you may be interested in: Part #1023040 Stock size intake valve Part #1023041 1mm oversized intake valve Part #1023043 Stock size exhaust valve
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