Well I got my RB Road Race header delivered today. It kinda pisses me off due to the fact that the car it is going on has a blown motor now... but that's another story.



It's going on a 1990 GTU. Anyone that has put this header on your street car, did you have a bung welded on for your O2 sensor? I am also straight piping from the header to the mufflers, my own kustom dual exhaust. Do I need to just block off the air tube going to the cat?



Any other thoughts or tips from someone who has done this would be appreciated.

ull need to buy or make a split air pipe block off plate....



but isnt getting rid of that whole system (airpump, etc) gonna render the 5th and 6th ports useless?

he didnt say he was getting rid of the air pump ... since it's s5 thats what he needs. the split air pipe is only necessary for 6pi on s4's.

sorry vito...i dont understand this non turbo crap