Joo still need a flex section. And a flange on the pipe somewhere where you can maybe bolt the lower-half of the pipe to maybe your tranny or oil pan would help, too. The more you secure your downpipe, the longer it will last.

On a DSM, there's a flange on teh exhaust that bolts to the block so that the weight of the exhaust and the torque of the motor doesn't bend and stress the exhaust pipes causing them to break. The flex section is between this flange and the rest of the exhaust ("b-pipe"). On DSMs where the builder chooses not to bolt this down, they frequently find their turbo flange bolts backing out within less than an oil change.

You already know the necessity of the flex section so I won't preach to the choir there... 3" is gonna be awesome where it comes to your spool time and that already looks like a HUGE improvement in the flow category. Nice job!

I know my cuz's welder sucks donkey balls, but it sure comes through in a pinch! :goodjob: