- Local time
- 3:43 AM
- Joined
- Mar 28, 2014
- Messages
- 33,597
- Reaction score
- 53,188
- Location
- South Louisiana
I have a set of 7/8" primary tube TTi headers going on my Roadrunner as soon as I get my 833 back from Passon. I have the 3" diameter collector adapters, which then will feed a set of Doug's 3" electronic cutouts, then I will have a 3" diameter X pipe, which will then tie into whatever remaining part of my existing 2 1/2" Flowmaster exhaust system can be used. **My question is: does the large opening common area design or small opening common area design X pipe offer better PERFORMANCE?** I have seen the inside of both, one has a larger chamber open common area, and the other has a much smaller opening that joins the 2 pipes together. Thanks!