Exhaust piping changes sizes...

[My5ABaby]

Originally Posted by RETed

That's the problem with crush-bent or non-mandrel bent pipes...

Is it going to restrict flow?
Of course it is...

If it a restriction to power?
It depends...

If you run one size bigger, it should be okay.
Non-turbos run 2.5" as a rule-of-thumb, so if that's 3" crush-bent pipe, you should be okay.
If that's a 2.5" crush-bent pipe, then I'd say it's restricting power.


-Ted

Is it an issue going from a smaller pipe (stock downpipe) to a larger pipe (what the shop put in) to a smaller size again (stock area)?