I want to order this eBay header, but it doesn't come with a donut gasket, just a flat one. Do I need to source a 2" donut gasket? I'm assuming my stock '90 gasket is 1.75" or less

http://cgi.ebay.com/ebaymotors/1990-...65%3A15|39%3A1

 

look on ebay for the gasket. i thought the high flow cats on ebay came with the donut gasket? not sure...

 

please keep your oem manifold over that POS

if you don't..and i hope you do..BUT if you just have to have one of those

you're stock donut will fit it, they almost always can be reused.

as to the size. a 2" will measure 1.75 inside

 

What makes my stock manifold better than that header?

 

its one of thoe ebay "stainless steel" ones that will crack over time. i've seen some ebay cheapies work well, but it all depends on which ones you get. i just looked at that link, and i have to agree, you won't notice a difference in performance with that thing. if anything, get a dc sports, greddy, megan ect...

 

One thing to remember is the 90/91 stock manifold is 4-1, 92+ were all 4-2-1, so it's pretty easy to out perform the stock 90/91 manifold