It was a good day, I had 2 thoughts:

1) Re Rod's high EGT's - maybe a good experiment for less than $100 shipped to his door would be to fit a muffler delete pipe and see if the improved exhaust flow decreases this high EGT problem. If it cures it, $100 fix! If it improves it but not by enough, at least you have much better confidence that a 4" turbo back system will improve it even more!

2) Been reading a post about a US guy who's turbo shaft snapped! There was a comment that this problem could have been caused by 'imbalance' caused by having a high-flow air cleaner, a 6637, and the stock 3.5" exhaust (LIKE I HAVE)!

Any comments?

 

1. Its Loaf400 (Rod) not that Rotten bloke I believe he has a straight through muffler. Just get the 4" and be done with it.
2. Its the first I have heard of it. Got a link. Could be a number of things,

 

see SOUNDING LIKE AN AM BU LANCE:

https://www.ford-trucks.com/forums/1...ambulance.html

 

Can I EASILY retain my 3.5" stock down pipe and do a 4" exhaust back from the bottom of the downpipe?
Do they sell 4" systems that bolt on to the standard downpipe?

Should I just buy this exhaust and when it gets here, head down to an exhaust shop and get it fitted?

http://www.riffraffdiesel.com/product/S6200PLM.html