Changed stock pipes to perrin up and down pipe on 05 wrx wagon. spf#5 fuse keeps blowing. Car will run for sometimes for 10 minutes then blow and sometimes only for 5 seconds then blow. Does anybody know what the spf#5 is for. Installed 2 cel fixes. I wonder if it has anything to do with that. The mechanical cel fix on the down pipe barely clears and is touching the car underbody. Maybe the wire got pinched? Installed a resistor for the down pipe. What about that? Can a resistor go bad and blow a fuse? Thanks for any help..

 

Sorry guys. That was my friend who posted under "need help". Spf#5 fuse is in the engine bay.

 

... i read the other post