E53 M54 Exhaust Headers

[Happy]

The RMS kit puts 400 hp to the flywheel. That was on 91 pump gas.

Add the headers, E85, with meth injection, I wouldn’t be surprised if it over 450. There is a LOT of torque.

Also, remember the differences between diesel, and non diesel engines. The redline on the diesel is substantially lower, resulting in lower input shaft speeds vs non diesel.

It doesn’t take much to blow a gearbox that is out of synchronization, in a high rpm shifting situation. It’s not so much the applied torque that is the concern, unless it is just stupid high on a gearbox that weak to extreme torque.

I am pretty sure I spun the crap out of the synchros. I will NOT be doing that again!