Awhile back, I was perusing through the new Mopar Performance catalog and came across a set of headers listed for the SRT8 cars. In the description, it states that these headers are for automatic transmission equipped vehicles only.

Does anyone know the exact reason for this?

If I try to bolt these headers onto a 6-speed car, will I run into problems?

Also, does anyone know what brand of headers these are?

I'm assuming that Mopar didn't fashion these in-house.