Manley Valve Spring, SPRING-1.580 DOUBLE 2007 Ford Mustang keeping the tire predictable during

keeping the tire predictable during long slides while remaining composed under track-day cornering loads

(VW/Audi automatic from 1993)

while isolating much of the engine vibration from the vehicles occupants

UMI’s 6565 F-150 lowered upper A-arm kit fits all 2015–2025 Ford F-150 models

UMI’s Street Performance tubular upper A-arms improve stability and steering with added caster

Manley Valve Spring, SPRING-1.580 DOUBLE 2007 Ford Mustang keeping the tire predictable duringFrom drag strips to short track and endurance circuits, the Manley NexTek series is engineered for serious racers. NexTek springs resist pressure loss and valve train degradation even in the most demanding race conditions. That means more consistent spring force deep into a run, reduced valve bounce, and improved overall stability for high RPM performance. Built to outperform and outlast in real world competition.