I need help on the location of where to weld my bung on my downpipe for the uego bosch sensor....i hear about 6 inches before the end of the downpipe before the cat. that to clear it up means not on the downsloping part of the DP but the horizontal part at the end .

Second i have a CEL code of insuficient EGR flow on a evo 9 with mods in my signature. it has 13k miles with a tune from tuning technologies and the only mod i added after the tune was the intercooler and the lower ic pipe which meant i had to reroute the boost controller and re adjust it slightly i was hiting boost limiter at first.....

any help i'd appreciate it.... i searched and idn't find anything useful, for those of you who always have to post "search!"
thanks guys