Motorsport 24 S65 headers

regular guy · 08-17-2013, 07:45 PM

Quote:

Originally Posted by kawasaki00

What is the primary diameter on the stock header?

Factory headers are 40mm primary diameter and 54.5mm collector. Aftermarket headers are available in 42mm and 44mm primaries, and not sure the collector size.

Quote:

Originally Posted by Bmw135er

The factory tri y setup will provide better torque than a 4-1 long tube collector will. The last thing the M3 needs is less torque

Factory header is short tube 4-1, not tri-y.

SouthShoreM3 · 08-17-2013, 09:54 PM

I actually got to see our S65 engine out this week on another M. The header set up is definitely very well designed from factory and beautiful at that. This was a completely stock engine and noticed on the headers a bluish tint to the piping. Thought it was rather interesting.

I was very impressed none the less and know why it's been hard for the best exhaust manufacturers to get better performance out of them. Possible ceramic coating on the stock ones or doing this on a high SC engine could be an option.

08-17-2013, 09:54 PM	#46
SouthShoreM3 Passes everything but the gas station 49 Rep 795 Posts Drives: 2010 E90 M3 Join Date: Jul 2010 Location: Boston, MA iTrader: (2)	I actually got to see our S65 engine out this week on another M. The header set up is definitely very well designed from factory and beautiful at that. This was a completely stock engine and noticed on the headers a bluish tint to the piping. Thought it was rather interesting. I was very impressed none the less and know why it's been hard for the best exhaust manufacturers to get better performance out of them. Possible ceramic coating on the stock ones or doing this on a high SC engine could be an option.
	Appreciate 0 Quote