I think its fair to say that next on the list for my mods is a new header.

I have a magnaflow catback on my MC and i have been lookin at lots of different headers, but most are 2.5 inch. Is it an issue performance wise to get the piping going from 2.5 inch to 2.25 inch? What do you guys recommend?

 

You wouldnt reduce the diameter of the piping on the header itself. An exhaust shop can either flare the piping between the cat or weld in a reducer. It just depends if you are gonna run a cat cause I see the magnaflow runs a resonator....

 

The only reason i am not going to change header is because everything is designed for the Cooper but also fits the Cooper non S. In my opinion, the 2.5 inch diameter is too much for a Cooper!
Consider a custom build one !

 

2.5" is a perfect diameter. Especially coupled with a good muffler. I wouldnt go any bigger than that for loss of back pressure.

 

why not just get a 2.5 to 2.25 header collector?

 

That too...

 

So you guys saying i should go for a custom build? I found some nice headers ,eg mini mania etc. I presume i could get it flared if need be.

 

all depends on how deep your pockets are. a simple collector will cost $50 us (aprox)

 

Im a fan of the cheap *** OBX header.... You can go through 4 of those compared to one MM one...

 

Ok so i have to get a collector/ flange built into it. Which header is the most popular one out there for the MC?

PS. nice signature muladesigns1, my cars name is Daisy

 

no offense

 

None taken