sup guys,

i'm installing another aftermarket header on my 2000 civic si
i ordered factory gaskets, for the head and collector

i just need to know .. will these fit?
or do i need aftermarket gaskets?

please lmk, thanks

 

Assuming the header is designed as a direct bolt on (in other words, not "JDM size"), then they will fit fine. If your header is the JDM ITR model, it will require a larger collector donut.

 

it's not jdm itr or replica of such, just 421 dc header
but just in case, where would i be able to buy a larger collector donut?
any auto parts store?

 

Any muffler shop will have them for sure.

Auto zone MAY have to order them.

 

awesome, thanks guys
hopefully this will take care of my exhaust leak