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If you've owned an STI for an extended period of time
resulting in improved throttle response and reduced turbo lag
While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus
Vossen HF6-5 20x9
846" / 181lbs @ 0
Toyo Proxes R888R Tire - 235/45ZR17 94W HF2-9M73 If you've owned an STIToyo Proxes R888R Tire 235 45ZR17 94W
US$ 115.00
US$ 36.45
US$ 49.99
US$ 90.00
US$ 200.00
US$ 200.00
US$ 196.00
US$ 100.00
US$ 155.00
US$ 59.99
