I had several criteria to meet. The stock pipes go under the engine and I didn't want that. If I ever get to doing a dry sump I want to be able to lower it a couple inches and take those 2x4 spacers out
. I also wanted the engine forward as much as I thought I could get away with, so it's gonna be tight. I also thought it would be good to get them outside the engine area quickly. I'm still contemplating a fan or two blowing upwards (or down?) just behind the firewall (1/8" alum, crosses fingers
). I'll cover it with some silica insulation. Maybe a sheet of phenolic too?
Anyway, my design is shorter than the stock ones. Mine is about 13"-14" to the collector and the stock is about 18". My understanding is the firing order is 1-3-2-4, so I think that my grouping should be alright, not as long as the stock one though. I got a decent deal on the stock header, which I pretty much needed for the manifolds that bolt to the head. I'l probably use both of the 2 to 1s and maybe those mount sections.
I spent a fair amount of time designing them to be equal length, maybe overkill?
I'm sure i'll have to do lots of heat shielding, there are a couple coolant lines going to the oil cooler.
Jamador, I did build a rotisserie for the frame, which allows full rotation. I'm hoping that will make any finish welding easier and the final cleaning/priming/painting easier.