I have duel 3" exhaust on my truck. Is that equevilent to a single 6"??? i use the turbo timer with my edge juice set to shut off at 300 degrees. Once i come to a stop, my EGT will be down to 300 within 30 seconds. Is this a good cool down time? And, romping on it I have yet to see egt climb pat 1300. Is that good?


BTW, this is pre turbo.

 

A dual 3" would be equivalent to roughly 4.25". Dealing with area's, so a square is applied to both.

Your temps both look good to me.