Well, I have them but was waiting until I had the car running. I can go ahead it's no problem.
The construction and welding is very nicely done. They fit well and don't even come close to hitting
the front suspension rods. I was also worried about the turnout hitting the rear suspension hairpin
mount, but absolutely no problems there.
I did have problems with the flange fitting over the ARP studs. I ended up drilling 5 of the flange holes
to 27/64" and one hole to 7/16". You might remember that I had Time-Serts installed in all the holes
and was told by the machinist that he locates the holes based on dimensions and not by locating off
the holes that are already there. So I hope that the studs are very accurately located and the flange if
accurate would fit on without trouble. But I cannot prove that my studs are NOT the problem. When I
asked Zach about this, he said that he bolted them up to and engine there in the shop. I checked the
one image from them (shown above) and it does not have bolts in all the holes, but maybe he did later.
The other disappointing outcome is the header ports don't match the exhaust ports in the head. I
thought that was the point of making those copper header gaskets and making them fit precisely and
then sending those to GP Headers. But when I asked about that, Zach said it was to make sure the
header ports were larger than the port in the head and did not hang over into the port at some point.
Since I don't deal with this type thing every day, I'm not sure if my expectations were too high. I never
asked the right question to exactly tie that point down.
They didn't send my copper gaskets back with the headers. So when I called I also asked for my PVC
back that was addition to their kit. They still had not broken down my mockup yet, but would do that
and get it out in a couple of days. So when I did not get the gaskets and PVC in three days I emailed
them. They got back with me saying that my stuff went to the wrong address, but they had talked to
the person that did get the gaskets and they are sending them to me.
So at this point I'm still waiting on my copper header gaskets to arrive.
.
The construction and welding is very nicely done. They fit well and don't even come close to hitting
the front suspension rods. I was also worried about the turnout hitting the rear suspension hairpin
mount, but absolutely no problems there.
I did have problems with the flange fitting over the ARP studs. I ended up drilling 5 of the flange holes
to 27/64" and one hole to 7/16". You might remember that I had Time-Serts installed in all the holes
and was told by the machinist that he locates the holes based on dimensions and not by locating off
the holes that are already there. So I hope that the studs are very accurately located and the flange if
accurate would fit on without trouble. But I cannot prove that my studs are NOT the problem. When I
asked Zach about this, he said that he bolted them up to and engine there in the shop. I checked the
one image from them (shown above) and it does not have bolts in all the holes, but maybe he did later.
The other disappointing outcome is the header ports don't match the exhaust ports in the head. I
thought that was the point of making those copper header gaskets and making them fit precisely and
then sending those to GP Headers. But when I asked about that, Zach said it was to make sure the
header ports were larger than the port in the head and did not hang over into the port at some point.
Since I don't deal with this type thing every day, I'm not sure if my expectations were too high. I never
asked the right question to exactly tie that point down.
They didn't send my copper gaskets back with the headers. So when I called I also asked for my PVC
back that was addition to their kit. They still had not broken down my mockup yet, but would do that
and get it out in a couple of days. So when I did not get the gaskets and PVC in three days I emailed
them. They got back with me saying that my stuff went to the wrong address, but they had talked to
the person that did get the gaskets and they are sending them to me.
So at this point I'm still waiting on my copper header gaskets to arrive.
.
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