Lude Generation

What I would like to know is I want to upgrade my exhaust, I have a fujitsubo manifold which will have a 3 inch collector mod attached to 3 inch piping with a 3 inch decat. Now would the 2.5 inch hytech twin loop cause a bad restriction? I know they're meant to be high flow but would going down to 2.5 cause a negative effect on performance?

Yes it's restricts the corrosion properties of galvanised steel so your arches will rot.



However on my Mugen twin loop back box which was 2.25" I had that pipe cut off and modified to a 2.5" pipe to it all flow matches.





Win.

Hytech twin loop?

Not seen them.

Yeah they are 2.5 the whole way through and sorry what do you mean about my arches rotting?

I couldn't figure out how to get a picture on here but it's on Google images https://www.google.co.uk/#q=hytech+twin+loop

Therealjj91 wrote:and sorry what do you mean about my arches rotting?

Ignore that bit, it has nothing to do with anything - it's just Ratty trying to be funny...

So does anyone know if it's a good or bad idea? Thanks.

physics says it will cause a restriction quite how noticeable it will be is something no one can tell you you will probably need a dyno to tell the difference if there is one

Actually it might be a good thing, warm gasses from the engine travel faster than cooler gasses so to speed up the flow a slight restriction toward the rear of the exhaust is a good thing. I have a reducer on the 3" system on my accord just before it splits in to the twin back boxes for this very reason.