Manley Exhaust Valve Set 11843-8; Severe Duty 1.88 x 5.422 Stainless for BBC
$310.91
Proven Fatigue Tests: The Severe Duty?. Valves have undergone rigorous fatigue tests. In normal operation valves experience 20 000 to 25 000 lbs of applied stress. When valves bounce on the seat this stress soars to 40 000 to 60 000 lbs.
