With the jb4 is there any way to install it without drilling a hole in the firewall. Only reason say there is a warranty engine issue. Kia will look everywhere for a reason to deny warranty and they will find the hole in the firewall. Second if its jb4, uni, lap3 etc with uni do they alter boost like the jb4? The price is very attractive compared to uni.
They all alter the standard boost. With JB4 you don't drill into the firewall, just push the rubber grommet aside and feed the cable through - it will still seal out any water etc .

