Bennis

I mean, I think half the reason they sound so good is because they are not using traditional merge collectors. The original gtsr unit has a flat style collector, the reproductions shown in this thread have angle-cut pipes, but the collection is still "flat". Could one not just use two 3-1 flat collectors and the exact same pipe lengths as the original item? Then again, I can't fabricate so I could be missing something obvious here.

Yep, some googling has revealed some pretty unsavoury stuff. Surely they can't be that hard to make though? It's strange no one else has ever attempted them (excl R31house).

Long time since I have been on SAU but I might be buying a new skyline. Definitely keen on a GTS-R manifold this time. The R31house takoashis are amazing. I noticed a fabricator in Australia is now making replica R31house takoashi style manifolds. The business is "speedtek". They have stainless versions on their Facebook page, and a steampipe version on ebay. Does anyone here know anything about these, and if they sound the same as the original GTS-R / R31house variants. The runner length and merge collector style is essential to the sound these manifolds make, so hopefully speedtek have those lengths correct. The stainless versions look perfect to me. The good thing about a gts-r or takoashi manifold is they sound completely different to any other turbo manifold, including equal length 6boost style ones... Some pics of these speedtek ones I have found are attached. Here's my favourite video of a GTS-R manifolded car. Rb20, itbs, gtsr mani, pure madness. This guys youtube account is pure exhaust porn for anyone interested. https://www.youtube.com/watch?v=bhw8Tpa78wg