warranty question...important help

[bacardisk3]

Ok as my other thread shows..installed g3 intakes...1000 miles later my check engine light came on..now I've read a intake and exhaust are normal and minor modifications that they won't void the warranty unless they can prove it stemmed from that..the code read 0300...the guy said it's a bad coil..spark plug or spark wire that Is causing this random misfire..cleared the code and it came back on today..is there ANY way possible they can blame this kn the stillen g3 intakes? Only had the car for a year and don't wanna throw away my warranty..I have all the stock parts if I need to swap it out but really don't wanna do that if I don't have to..help..thanks