Fine tune the operation of your Tial Q BOV with these springs. Pick the spring that best matches your engines vacuum for best results

Use these springs to suit your boost pressure requirements for the 38mm Wastegate. Higher pressure settings require the use of both small and large diameter springs. To pick a pressure above whats listed you can combine a small and large spring to reach your required boost level.

Use these springs to suit your boost pressure requirements for the 44mm Wastegate. Higher pressure settings require the use of both small and large diameter springs. To pick a pressure above whats listed you can combine a small and large spring to reach your required boost level.

Use these springs to suit your boost pressure requirements for the V60 Wastegate

Use these springs to suit your boost pressure requirements for the MVR 44mm Wastegate

Use these springs to suit your boost pressure requirements for the MVS 38mm Wastegate