Correcting speedo after gear change
I also had a black box come with my gear set from slp. With this you can put in your gear ratio youself. (it stays hard wired to your car) I think they might sell them at slp. I would serously get a comp tune like mentioned above.
Do it quick or your going to lose mileage to your motor like me, since your computer thinks that you have stock gears in the back.


