A lot of R&D.... Lol.. He figured out a way to relocate the bolt holes on a standard HR manifold and that's the only change he made... It's a OEM Nissan piece costing $250 if you bought it in the store, with changed bolt pattern...
With full bolt ons you will be losing power... Your money is better spend elsewhere... Or keep your money in your pocket until VVEL is widely incorporated into tuning.
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