I have a 1990 integra with custom exhaust and I have a neuspeed header(no turbo) I found I have a bit of rust on my header down pipe and a crack in it therefore I want to get a new header and or downpipe. I don't know what the best stuff out there is but I wanted to know whats best to use for the most power. Keep the neuspeed and just get a new downpipe? I want to go with something on ebay for pretty cheep and I would like to have no smaller than 2-1/4in. as the rest of my system is that size but most seem to be only 2 inch.
Does anybody out there know what/where I should be looking?
Thanks.

 

Thanks for the input.


Is there a thread anywhere on here about which ones flow best. Just looking for some actual info/flowcharts.