HOTSHOT header revival: Gaskets!

Alright peoples

the primera I got had a hotshot header on it, but it was fkd and it was cheaper to get a brand new toyosports one fitted.

months and months down the line, i have had no joy with the toyosports one. Countless new gaskets and the gap between the o2 sensor wiring and the fan is so small you can't fit a rizzla in there. Terrible placement.

I am getting the hotshot one repaired, it needs a weld fixing and it needs a new flexi pipe (I am using UK terms here... I think you guys call that part a collector?????)

I feel that there were more gains power wise with the toyosports one, however for design and ease of working around it, I am taking it off the car. I've managed to damage the radiator trying to take one of the fans out which kind of made the decision for me.

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Whole point of posting this up:

I need new gaskets. I am getting the manifold gasket straight from Nissan, but the gasket between the 4-2 and the downpipe, and the gasket between the downpipe and the cat, I do not know where to source them.

I believe that the gaskets are different to those on the toyosport as the joins are a lot smaller on the hotshot.

would an exhaust specialist be able to help with these? as in custom make some or what?

any help would be appreciated