Winter project: Exhaust!

[Dave80GTSi]

In my humble opinion, I believe that you are over-thinking the headers.

Is this to be a no-compromise track-only car, where every last bit of power needs to be coaxed from the engine?

If not, I sincerely doubt that one header style vs. another will amount to any performance differences whatsoever, especially if your existing OEM exhaust manifolds are the Euro spec 3 tube into 1 style (as contrasted against those USA spec models which include the built-in cats).

But if you do have the USA spec built-in cat manifolds, then you may want to give this thread a read:

For Sale: Hollowed OEM Exhaust Manifolds, Complete with Mini-Cats

[Robert986]

Over-thinking? Me??

Hell yeah!!!!!

Actually, thats what makes it all fun to me, I mean the car runs great, I have got very nice sound and good power.. So, it´s obviously time to make things complicated. It´s all a hobby and I love to go "all the way" in everything I do, so your observation is definitely correct!


About the headers not being equal length, I might be mistaken but from pictures of the "e-bay headers" I think it looks like un-equal length. But when I (over)think about it, that sounds strange, why produce headers with un-equal length?

I was out today on a great autumn-drive, thought about my exhaust plans and realise that if I go all in as intended it most certainly will be far too loud.. And droning, so. More over-thinking needed..

-To answer if this will be a no-compromise track car: No, the general idea is a "stealth track car", It must serve as a street car but be as capable as possible at the track. This means that I want to get rid of all the "low hanging" weight, so a lighter exhaust is one of many pieces in the puzzle.