Seeing conflicting information passed around ClubGP on these new headers had me wondering if people didn't know what they were talking about or if they had something to gain from lying about them. Here'* some unbias'd info for those interested.
The header packaging was not too bad, shipping was fast.
Headers are 304 or 321 stainless (something non magnetic) The problem is that the flange is mild steel and will rust. Proof of this is me holding up a header with a magnet below.
1 5/8" primaries, 2.25" crossover and 3" exit. All 18 gauge. Flanges are 3/8"
Welding is average with some spots being very good to some spots being poor. There is a crack in the welding on a couple of primaries where they attach to the flange. I don't know if this will cause an issue or not.
The collector welding is poor with gobs of slag and filler as shown below.
They are not polished as shown on Ebay but that shouldn't affect performance.
The flex is single wall and similar to the other header flexes on the market.
We haven't installed them, so I can't give info on that yet. There are no instructions what-so-ever and no included gaskets or O2 extension.
Overall, I think the price is pretty good and I didn't expect anything more or less that what we received.