are these any good? HONDA CIVIC SI APEXI N1 CARBON MUFFLER and
GREDDY 4-2-1 1PC STAINLESS HEADER 99-00 HONDA CIVIC SI and
TSUDO HONDA CIVIC SI 99-00 TRI-Y 4-2-1 1 PIECE HEADER

I'm buying parts on ebay but I don't know if these are good. Ii want something at a good price but I don't want to buy trash either.

 

no go on the muffler. its not a performance catback and it will sound like crap.

you only need one header.