K11 95, pre-facelift exhaust Diameter?

[johnbr6]

Getting a Mandrel bent system for the car on Monday

Just wandering what the standard diameter, the standard system is? think its 38mm IIRC, thinking of upping it slightly just wanna make sure

 

[Daniel]

Not much, something like 1", 1.5"? It's not huge by any means. Don't up it too much though, otherwise you'll lose all your back pressure

 

[johnbr6]

Yeh man, know not to up it much etc Ive done my reasearch with my 2.0 prim lol just wasn't sure what size the exhaust is on the micra

Im thinking of just getting a stainless mandrel bent OEM spec system! just tucked into the car more and has that nicer sound to it. making my own manifold for it too.

 

[Daniel]

Sounds good mate (Y). Hope to see photo updates once the ball's rolling :grinning:. 4-1 manifold or 4-2-1?

 

[johnbr6]

4-2-1, single flanges rather than one for the four pipes and design based on the ASP budget header for the SR20s lol

should have a bit more go and sound with it cant wait. Manifold will be done later, the exhaust part is getting done for now

 

[Daniel]

That's definitely going to improve it a lot. And 1 flange sounds much easier than 4 seperate ones (Y)