Exhaust paint Options

[Cal]

I recently purchased an original exhaust for my '74 2.0L that's in excellent condition. I was thinking of using the VHT SP104 high heat flat grey paint to finish it off....any advise on other paints that I should consider?

I'm also going to repaint the heater control flaps, boxes and pipes in satin black.....do those need high heat paint as well?

[Krieger]

I used 3m Weld Through on my stock 911 muffler. I tried it because it is what I had and was tired of spending $ and making parts runs. It has held up extremely well with track use over 18 months. Three years total time. No used in wet conditions though. I would buy a can to do this again. I wire wheeled and cleaned before I sprayed.

[Tom_T]

I used 3m Weld Through on my stock 911 muffler. I tried it because it is what I had and was tired of spending $ and making parts runs. It has held up extremely well with track use over 18 months. Three years total time. No used in wet conditions though. I would buy a can to do this again. I wire wheeled and cleaned before I sprayed.

Wurth also makes a high-zinc (98% IIRC) weld-through primer which dries to a similar grey to the Porsche Exhaust Grey color - which I've used to prime areas on my 914 after wire-wheeling off surface rust as a rust preventative holding measure as I slowly work on my 914.

But I don't know if theirs, 3M's nor Eastwood's zind-rich weld-through primers are high temp for use on exhaust systems.

If so, then I would still use them as the primer coat to prevent more rust, then top coat with something like the Stoddard Porsche Exhaust Grey Hi-temp paint as the top coat, since the primer is more porous, while the paint will seal out the moisture better.

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Tom
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