Duramax S400 Install 

To start the build files of our channel, we have this S400 install on my duramax. Tune in and watch as Johnny shares tricks, how to's, a build breakdown, and finally sound clips at the end.
For those of you interested in also S400 or S300 swapping your duramax trucks, here is an itemized list of performance parts sizing that you will find helpful for your application. This setup performs really well.
S468/83 .9A/R
S&S 100% injectors and 10mm CP3
Alex Tucan, with Above All Diesel built Allison(750whp)
Georend DK converter 2,200 stall
PPE high flow uppipes and manifolds
WCFAB piping, and T4 pedastool
FASS 150GPH