When I had my rotator cuff surgery my buddy installed a used hks legamax exhaust on my car. He reused the old gasket at the muffler and didn't clean up the gasket surfaces. I need a new gasket and don't have the strength to do a lot of fooling around, so I'd like to source the part before taking anything apart. I emailed hks and they responded with
"Yes you will need to measure the ID of the pipe were the gasket goes then add 2mm to if to make sure that it does not restrict the flow. You can get them at most all auto parts stores or some of them can be ordered from HKS USA"
So my question is does anyone know where I can get one or answer what the ID is of the pipe. With a quick search I found a few sites/ebay that shows the ID but I'd feel better if it was coming from a club member.

 

I have the Legamax and I replaced the rear gasket that connects the mufflers to the mid section pipe maybe 3 years ago because the gasket broke and gave me a nasty exhaust leak. IIRC it was a 2.5in 2 bolt flange gasket. I bought a pair of them off eBay for something like 10 bucks.

I Remember I had to dremel a small bit out of it since the exhaust is a little bigger than 2.5in. But it's been working perfectly so far for the past 3 years with no exhaust leaks I put a light coat of copper exhaust rtv on the gasket and installed it and it's been running flawless since.

You don't need to remove the exhaust to replace the gasket. Just unbolt it and rotate it down from the hangers.