Well project is finally wrapping up and I got access to a digital camera. Is there anything wrong with putting in a flex section into exhaust after downpipe and how will it effect performance and sound. The inside has ridges which I wasnt counting on. Here is the photos:





If anyone has information it would be a great help. By the way you can get 3" flex from http://www.roadraceengineering.com for $60.00 out of stainless if anyone was looking for it.

Thanks
-Morbius

 

i thought rx7s didnt really need them due to the way the engine shook.. it wouldnt crack any of the exhaust by the way the rotary shakes.. i wouldnt say its a bad thing to have I think you could do without it..

 

A lot of people get along without one but I don't think its a good thing to do so. If your car is lowered or if the dp sticks out a little and it bottoms out a lot of torque is created at the turbine housing to dp flanges. I didn't have a flex section and bottomed out once and cracked the weld on the flange of the turbine outlet- all the way around.

I have a flex section on both the dp and the wastegate paths. A flex section won't affect performance or sound significantly.