just a quick question because i have no idea and couldnt find the answer anywhere; Will a 70mm or 76mm skunk2 fit to the stock headers without having to do anything?

 

I have the 76mm and at first i had the stock header. when you recieve your exhaust it will come with a adapter. Now i have it connected to the megapower header. Check out my build thread and you will see the exhaust... its BRANDON SKUNK2 Powered Mugen Si https://honda-tech.com/forums/honda-civic-2006-2015-79/brandons-skunk2-powered-mugen-si-3019280/ Here the link you'll kinda see the adapter in one of the pics

 

thanks a lot man