Diameter of 68 Valiant 170 single exhaust system?

roccodart440 said
As in the stock system?

I had 6>1 headers on mine with a 3" collector. I ran a single 3" stainless system with a borla SS XR-1 glasspack style muffler.

Regardless of the system The XR-1 is my favorite glasspack style muffler. I run them on my current 440 dart.
Click to expand...

Thx for your answer. I mean at the end of the first pipe/beginning of the original muffler. I want to place a glasspack there (at the moment I can not go under the car to check the diameter)