Is this magnaflow system a full 3 inch? On the website with the coupons it is described as 3 inch splitting into 2.5 inch?
Will it mate perfectly with an Ultimate Racing downpipe?
The inlet of the exhaust is only 2.5" so that it can mate to your stock downpipe/OEM clamp.
Then it flares to 3" and then after the Y split....it's down to 2.5" on each side to the exhaust tips.
So if you want a full 3" exhaust, you'd have to cut off the inlet and have it extended with custom work
As for your UR downpipe, if you have a reducer (like if you're running the stock cat-back currently)...then this will bolt right on