Manley Valve Spring, SPRING-1.580 DOUBLE 2007 Ford Mustang and swap a Small-Block or

and swap a Small-Block or Big-Block Chevy engine into your F-body with a Tubular K-members from BMR Suspension

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

Navigator 6R80)

Combine this with eccentric adjustment bolts that can't handle hard launch with sticky tires

while isolating much of the engine vibration from the vehicles occupants

Manley Valve Spring, SPRING-1.580 DOUBLE 2007 Ford Mustang and swap a Small-Block orFrom 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.