Not thinking tips will change the sound any. I did see 4" tips advertised with regards to the active valve set they list.Yes the Roush tips are a different piece and if you notice they're almost the exact same setup and shape as the Corsa tips. I've seen 2 people put the Corsa 4" tips on the Roush axle back and with a slight modification to make it fit, it looks great.
Edit: example thread here: https://www.mustang6g.com/forums/threads/2018-gt-roush-axle-back-exhaust-corsa-tips.105734/
Like I said before it's a small complaint that I haven't felt like throwing another $300 to fix it...it just sounds to good now.
IMHO you'd have to be blind to not notice the difference though. I also wonder what Roush meant when they advertised a 4" tip, is it 4"'s long or something?
No spec for axle back , when looking at the site. I noticed the differences viewing two pictures of the rear with systems side by side .......... hoping, they were the same, now confirm they are not....boo
300 bucks for tips LMAO I can make that happen for a quarter of the price. Do not mind paying a functioning upgrade, tips are not one.
Thanks, for the information.