[RarlyL8]

I must respectfully disagree.
Header design is specific to application. Heat and velocity run a turbo, meaning the pipe size is critical. Short tube headers work and are easy to make and package well which is why they are the standard. Also EFI narrows the advantages of a tuned system as opposed to "dump it quick as you can get it there" system. Street turbos spend little time on boost which is where a properly sized tuned system helps out. There is also a bump in HP at the top end as the organized pulses hit the turbine in order. Even without all that the sound is worth the effort. Exotic, no more motor boat.