So car seems to be sorted and running well now.
Had many issues with tune and running way way too rich. The problem turned out to be soldering the O2 sensor harness. Do Not Do This. I hadn't read about this problem enough, and when asked by the fabricator, said sure go ahead.
It had black sooty emissions and I couldn't get MPG over 14mpg even with a long 60mph cruise. Something that should be about 25mpg for me.
Anyway, so I ended up getting new primary O2 sensors with new OEM harness, and just unplugged and tucked away the secondary O2 sensors. And after clearing codes, it now runs like a champ. MPG back to normal. Still smells a bit, but this is normal for no cats.
Fitment is probably 90% there. It has a slight vibration on the steering column, only on fast-ish right hand turn. And the passenger side slightly vibrates on the a heat-shield under hard acceleration. It'll go back for those over the next couple of weeks when I get some time. Just want to enjoy driving it for a while.
Good to hear you're getting there buddy and looking forward to 1/4 mile results. Good luck with achieving the target!
If I can point out one minor thing that may or may not have been sorted depending on when the picture has been taken. It's the gearbox bracket that supports the exhaust. It appears missing in the pic. Possibly refitted but if not, it's worth putting it back as it takes the weight of the down/pipes off the headers. Looks good otherwise
With trap speeds about 1mph higher but it being 11 degrees hotter outside, suggests the engine car should be making more power with these headers, which is reassuring at least. It most certainly sounds better.
