this is after only 7-10k miles









taken from this thread: http://www.clubgp.com/newforum/tm.as...mode=1&smode=1

WOW

thats pretty rock solid proof, on why you should'nt use header wrap!

It'* been a no-no for stock manifolds and headers for awhile. Cast manifolds might be ok for awhile.

Use header coating. Even DIY. Never paint (even if rated for headers, it'* worthless). If you MUST wrap, use a LOOSE sleeve type wrap that will allow them to shed moisture and breathe.

WOW, that'* bad. I'm glad I used powder coating on mine.

Powder coating? Why didn't you use header coating?

Doesn't it mostly affect welds? I have my crossover pipe on my PEM'* wrapped in header wrap and it does make a difference. I can touch the wrapped crossover with my hand while the car is running where touching the front manifold would quickly blister my skin. I'm pretty sure Rogue'* headers have the crossover wrapped as well. So far I've had my crossover wrapped for about 9 months and it'* been fine.

Would i wrap the front or rear manifolds? Never. The proof is in the pics.

The extra heat you get from header wraps also means more heat expansion and contraction, those welds probably just expand and contract at a different rate than headers itself. Those are some big cracks though!

It has nothing to do with expansion and contraction. It has everything to do with trapped moisture and heat.

Is it published anywhere what they use as welding material? I'd be surprised if stainless oxidized that much already..

I know this is a first gen PLOG, but on ZZP'* site, they state "stainless tig welds" for the current version.