Hey all, I'm looking at potentially upgrading my headers and muffler. I currently have a MAC 4into1 megaphone with the black finish, which I installed a few years ago. Unfortunately I can't keep her in a shed or garage, so she stays outside covered. This has had a horrible effect on headers, and they have started developing rust. I tried some sandpaper and rust converter, but that only lasted about a season before more started building up.
I've been looking at the delkevic stainless steel 4into1 systems. They look pretty nice, but I have yet to see any reviews on their longevity. Do any owners who have had them installed for a few years (preferably with exposure to the elements) frequent the forum that could give feedback? Rust? Bronzing? Going from a MAC exhaust, would rejetting be necessary? I'm talking about a 77 cb550k. If you have another exhaust you've installed and swear by, please let me know.
Other complicating matter, when I had my header mounting bolts installed by a shop, they installed more than half of them backwards, so the clearance for the nut to grip the header mounting bolt once the flanges and shims are in place is barely enough to grip and maintain tightness on some pipes. I don't want to have to try uninstalling them, potentially breaking them in the head and requiring a more exhaustive surgery, so any notes on tolerances/clearances would be appreciated, though I know this is probably a bit of a stretch.
Thanks all.
