I am curious on this thread... I just bought CSX 6079 (i get the car in september) I am not happy with the primary pipes as they have several welds instead of being one piece design with a pipe bender. My ERA primary pipes and side pipes are excellent quality. I am considering using ERA primary and side pipes on my CSX because of this issue. I am confident they will fit because the foot boxes are bigger in the ERA than the CSX. I may need to shim the steering rack or make slight mods to the drivers side heat shield over the brake/clutch master cylinder. But overall I think the bodys of the ERA and the CSX are almost identical.. any one here tried this yet?
And by looking at your condition, somthing has changed. Is it possible the motor mont bolts to chassis are loose and the motor has shifted? Also ERA puts a bolt and a nyloc through the motor mount to prevent flex... look at this
Left engine mount modifications