lol. so basically don't do what i did. i spent more money than a custom hand-fabricated system would have run you but it was due to a series of events rather than any planning. i bought my ST in April of 2020. at that time the only aftermarket system available was Borla. i knew that sticking with 2.25" pipe wasn't going to get me any power gains but the stock noise was pathetic so something had to be done. this setup lasted until i did downpipes and they immediately blew out my mesh flex joints. i, like you, like the Borla sound the best out of whats available, so i ordered the thermal mid-pipe kit that came with vibrant woven flex joints. that mid-pipe kit is 2.5" so i then had an exhaust shop fit up 2.5" pipe wherever there was 2.25" previously before in the borla kit. at this point, i basically paid $1200 for 3 borla ATAK mufflers (one mid mount and two in the back) as thats all thats left from the original system, plus another $450 for the thermal mid kit, plus $600 for the stainless 2.5" piping and welding connecting everything together.
like i said. don't do what i did. the good news though is that i have a 2.5" deeper sounding Borla kit that has ZERO resonance problems without the need for resonators of any kind, AND have a kit that can handle more power than the stock turbos are capable of putting out. so i'm happy.
I kinda went down the same road and wish I had of custom built the exhaust from the dp's out.
I bought the Borla Atak thinking I`d be happy with the additional sound over stock - I wasn't overly impressed for more than a few months.
That led to removing the mid resonator and putting in a X-pipe - This is now more than enough sounds with drone which kinda sucks but I can bare it.
That led to the flex pipe couplings now vibrating ridiculously.
I have SPD down pipes going in on Monday with the stock flex pipes and know I`m in for a disaster.
I already ordered the new flex pipe couplings from Vibrant and hope they come in next week but still haven`t received the ship notificaiton.
So...if the dp`s go in before the flex pipe couplings are changed, what exactly will I be facing in terms of noise issue and anything else associated with down pipes on stock mesh flex pipe couplings..
I heard the down pipes, as you mentioned, will literally destroy the stock flex couplings and the sound is insanely bad.
I drive around now embarrassed tbh by the rattling noise I get with the exhaust and x-pipe I can`t imagine down pipes now lol.
I`ve been waiting so long I just want to get them on and run the risk with noise for hopefully no more than a week when the new mesh Vibrant ones come in.
What do you think since you`ve done it already?