This Upgrade Kit contains a brand new "Light Spring" for tuning boost no more than approximately 7 PSI over your 'stock' wastegate setting. Good if you want your Joe P MBC XZ to be a little more mild and to obtain slightly more precise fine-tuned boost settings. This "Light Spring" set-up is NOT necessary (or even advised) for most applications, but is perfect for low-boost set-ups and set-ups where extra-fine boost tuning is desired. (Not necessary for most applications, but useful for: RX7, Volvo, Mazdaspeed Protege, and some "low-boost" applications.)

This kit includes the adjustment knob, hand nut, two steel balls, and a Joe P custom-wound Light Spring. Instructions included.

AVAILABILITY: Typically ships SAME DAY