Stock COS3 for Holden 9381344 OS

[VEV8]

Can anyone help me with a stock COS3 or COS5 manual tune file to upgrade the OS 9381344 found in a VT11.. Im not sure what the process is to convert that OS to a COS.. Cheers Ryan

[GMPX]

It doesn't exist, the early VTII OS is not a nice to tune as the VX and up, most people will just use the VX - VYII 12225074 OS instead, there is also a custom OS for that.

[VEV8]

so will a VX 12225074 flash straight in over the VT 9381344 OS?

[GMPX]

Yes it will (full flash), but the injectors are different, you will need to copy the injector table from your VT tune in to the VX tune.