hey i just put in a tsudo down pipe in my car i guess its supposed to be a helix replica but anyways the guy told me that i would need a cel fix and to come back cuz they needed to order them in i installed the dp the same night and no cel came on is that weird or was the guy just sayin id need one to buy it thanks

 

well i guess ill just wait n see if it does come on before i get it thanks for the reply

 

I have installed an hks up and hks dp and hks high power cat back. My cel light came on, the code it threw was p0546. It says first sensor has high input. What do i need to do to fix this problem?Also heard i can put a resister on the egt wires off the down pipe. was wondering if i would remove the egt sensior?