Weird, so I was just out measuring the end diameter of our stock exhaust (2013 Ab), and was able to measure the diameter of the pipe sections after the 'T' that splits to each exhaust tip. To my surprise, the diameter was only between 1.75 and 1.80 inches. Eyeballing it from the side with a straight-edge ruler, I eyeballed 1.75".
Thinking it must be an optical illusion, I grabbed a tape measurer, and wrapped it around the circumference and got about 5.75", which divided by π (pie) = 1.83".
I thought we had a 2" pipe from cat back?
Also for those curious and thinking about alternative exhaust tips, make sure you take a close look at what's going on. The 'T' split pipes done line up with the OEM exhaust tip openings in the rear diffusor correctly. To compensate, the factory actually puts a 1" bend in the exhaust tips to get them to line up with the diffusor openings, and to make it worse, the L and R sides are both different in the 'approach' of these pipes (not symmetrical). Put another way, adding after-market tips will require removing the outer 4" metal pieces that are welded onto the inner 2" pipes, and then re-using the 'straight' portion of those inner 2" pipes to attach your after market tips to, and even then, you have to hope those inner pipes of our stock tips are actually pointed straight ...eyeballing them, it appears as though the Left tip inner pipe doesn't even make its way through the outer 4" portion of the tip in a straight fashion!
But back to my sanity check question: is our piping after the T split REALLY only ~1.8" diameter?? #wow. Makes me want to measure upstream of the T split too...which I wasn't able to do tonight in the dark, under a lowered car.
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Originally Posted by Abarth Five O
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