I ordered mine and installed it last year, and the auction was for the Non-Nismo axle back. When they came in and I installed them, they stuck out almost an inch further than they should (It was listed at .5" from bumper, but was more like 1.5") Top-Speed was very nice, and admitted they mocked up the exhaust on a nismo model, and didn't take into consideration the bumper differences. They ended up refunding me $50. (Not bad to get a decent axle back for $150)
I had a local exhaust shop look at it, and they said most likely they would trim directly behind the exhaust tip to decrease the amount they stick out, and it'd be between $75 - $100 for the labor but, after having it on for almost a year, the amount the tips stick out isn't as noticeable, you don't get any exhaust funk on the bumper and the tips look nice too. Pics below with measurements
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