Is this the bored out 400 to 500 cylinder setup?
The 500 pipe will not fit your setup without modifying it, a 400 pipe will fit but not offer the performance of the 500 pipe (as it was designed for the 500cc displacement).
I have a repaired Power Pros Torque pipe for a 400 if you're interested in that. I'm going to be removing the Power Pros pipes from the store I think, they've been hard to deal with, don't care for the small fy guy like me I guess :roll:
Actually I have a plain steel torque pipe I'd sell as well, I believe it's in fine shape.