This listing is for a set of springs as pictured (For Turbosmart actuators only).
 
Specifications:
SIZE A:
OD: Approx 48.7MM
Length: Approx 116.1MM

SIZE B:
OD: Approx 37.1MM
Length: Approx 62.3MM

Pressure rating: 13-15Psi (approx 1 BAR)

Springs are still the best way to regulate the amount of boost that's blowing into your turbo. For the ultimate control over your boost, customize your wastegate with these replacement springs, the only interchangeable Wastegate Springs designed exclusively for the Turbosmart Actuator. Whether you're aiming for a modest 3PSI, a hard-charging 14PSI or a custom boost level, these springs make it simple.
 
Each spring is designed to work alone or in groups, so you can mix and match different springs for the optimal PSI. Simply stack up to three springs together inside your Turbosmart wastegate, and you'll hit the ideal boost rate you're after.
 
Installation is easy: Just pop off the locking collar, pull out your old spring and fit in the new.

Please Note:
Exceeding the boost level recommendations for your engine may result in damage. When tuning, start with a lower PSI spring and gradually swap springs until the desired boost level is reached.