D&D Billet Cat exhaust problems

[egl1962]

Anyone have any first hand knowledge on this issue with the ceramic coating on the inside of the D&D pipes entering the motors by way of reversion and takinge motors out? Just wondering if this is a bad batch issue or what? I run a black billet cat on my road glide for about a year and a half or so and haven't had any issues. Actually I just had it dynoed again about three weeks ago. Is this an issue that would manifest itself relatively soon after the initial install or could happen at anytime? I do know the exterior coating is subpar for sure and their customer service sucks. If you are lucky enough for them to pick up the phone when you call you are greeted with rudeness and arrogance. Just trying to figure out if it's time to start looking at other exhaust systems or not? 

[FLDavetrain]

I've had the exact opposite experience on the phone w them over 10 yrs. And find their black heat shield coating very durable IF you maintain it regularly (hd polish cleaner). And the internal coating no issue

I have heard the recent complaints. Seems odd to me but then again only read some claims.

[FXDBI]

Sounds like a internet story some shops excuse for a failed engine. Cant see the coating traveling backwards in the exhaust and destroying the engine. More like a lousy tune and dirty assembly.  Bob

[jsachs1]

My dyno guy had 2 of these, D&D, that went bad from this reversion. I recall the same problem years ago, with a different manufacture, that supplied headers to Custom Chrome. 
John

[98fxstc]

Fair bit of discussion on facebook about it.
One guy reckons he has lost two top ends.

[harpwrench]

I saw something like this discussed on one of the sealed power YouTube videos that Lake Speed does. An engine builder described how rust inside the headers was getting sucked back into the cylinders on startup, and trashing it. Now when they start one up after sitting it's with the throttle open so it's going out the pipe instead.

[Ohio HD]

It limits the selection, but using a stainless steel pipe resolves any real chance of that happening. Other than some loose carbon in the exhaust, nothing else would be introduced on reversion and cam overlap.

[SP33DY]

I saw something like this discussed on one of the sealed power YouTube videos that Lake Speed does. An engine builder described how rust inside the headers was getting sucked back into the cylinders on startup, and trashing it. Now when they start one up after sitting it's with the throttle open so it's going out the pipe instead.

Jon Kaase posted that video. I tried to find it so I could link it here, but was unsuccessful. Jon Kasse is right up there with Warren Johnson and Darren Morgan in my book. When they speak, pay attention because they are not blowin' smoke! 

[Ohio HD]

I stole this from HV.   

[Ohio HD]

I'm glad that I subscribed to the "Master Tech Miller" YouTube videos when I swiped the above video. He's been in contact with D&D and they've acknowledged the problem, and has a fix for the pipes effected, and also more inspection when manufacturing. He says the problem is sand media that wasn't cleaned out of some pipes.

[JSD]

I saw Tommy Millers u tube video last week. I thought it was going to be a joke but no . 

[scott7d]

I didn't experience this but my old Billet Cat looked like it came from a junk yard after about a month. Rust, fading, discoloration, fitment issues that almost wore a hole through my timing cover, the pipe constantly sliding back from the collector area. My Boarzilla was a piece of junk as well. Great sounding pipes and good power. Not robust for long distance touring. My black Harley heat shields can be caked with mud and clean up to look like new.