yes, they will.

Yes I am sure.

Sent from my Nexus 5 using Tapatalk

What type of power gain could one expect with akro headers? I have a 08 sd all done up motohooligan re map and leo vince cans and was wondeing if the akro headers would do anything for me as far as real performance gains. Any of you have any thoughts on this? Is it a waste of time and money?

You'll get a nice weight loss, and between the seat !

I'm sure someone did a thread on this and found that there wasn't much bhp/£€$ so wasn't worth it. But depends which headers, if it's just the SDR ones or the power parts ones (think these only fit the evo cans(?)), as they are different.

They are off of an 08 sdr which should hook to a stock exhaust correct? If so wouldnt my aftermarket slip ons hook up to them?

The sdr akra headers do not work on the standard sd. Waste of time andere money.
They will not give noticeable gains in power or torque and will only make the oil change a bigger pita