^ local exhaust shop or local auto parts store. I know my exhaust shop had a whole bunch of different size exhaust doughnuts and we just found one that worked. Or on Google, i searched for "civic ehxuast gasket" and a buncha doughnut style gaskets showed up: CLICK ME!

 

Go to any auto supply store, with the knowledge of knowing what diameter of donut gasket you need. Ask to have a look at any that is the diameter you need and see which one will work. a stock sized one will not work in most aftermarket header applications (it didn't in my case)

 

would it be a 2.5 inch since my header pipesare 2.5 inches, or couldnt i just buy it from the weapon r site so i get a perfect fit?

 

Just go up to a muffler shop and theyll have what you need to fix it. Ive had a leak before and they put a new gasket on fixed up a ****ty weld spot for like 30 bucks.

 

another question.

with the cel eliminator, is their a certain way to put it on, or do i need to do something cuz i put it on the header where its suppose to be and the light wont go off.