For those who want to see what all the hoopla is about...

http://cgi.ebay.com.au/M4-Full-Race-...item19bced157d






Apologies for the size if it's not correct, but I thought those interested would want maximum detail...

 

I have an M4 system on my Hawk GT. They are nice, for that price ($1,230 USD), I would go with new Staintunes.

 

+1, Staintunes are awesome.

 

Finally some pictures of a complete system!

Does it not have a crossover??

 

Actually the crossover is fully visible in the picture, holding the horizontal pipe part for the front header to the loop of the rear header...

 

Unless I am looking at that wrong, that is just connecting the rear back to itself, and holding up the front exhaust.

Edit: wait I see it, in front of the loop!

 

This guy is local, so I will ask if I can get some better pics., maybe even go and inspect (measure!).
The man obviously knows how unobtainable these are and what they are supposed to do for grunt, hence the totally unrealistic price. Now if everyone would stand back and not bid, so I can lowball him after the auction finishes.......yeah, in my dreams.

Just looking harder, it looks like there is no collector section, just a balance pipe between the pipes from front and rear cylinder, and the reason for the stacking effect is to get the 2 pipes to be the same length. Thoughts anyone?

 

Same on my Hawk GT - equal length pipes. The M4 is generally understoond to be the best performing exhaust for the Hawk GT.