Mac has pipes.

[unitivegreybird]

Does the MAC system come with the rear pipe or do you use the one off the stock system? My friend that's installing the pipes for me can't find the rear pipe.

What do you mean rear pipe? The Mac system only has 3 main components: A 2-into-1 header from the front cylinder, the 2 cans held together with a bracket, and a rear Y pipe from the rear cylinder. I've heard that you're supposed to use the stock Y pipe, but I bought my MACs used and they came with a Y pipe.

[Rikugun]

If you are referring to the Y pipe and it's couplings to the head, yes. I think anyway, never installed mine.  :P

[Rick G]

Use the factory Y pipe and connections.

[artbone]

Thanks to everyone who replied. I just saw MACs for sale on Ebay by Niche Cycle in Florida.