600HP Subaru WRX STI ft. Tomei Exhaust & Sequential Gearbox! – OnBoard PORN SOUND! Acceleration & Sound Drag & Track by turboandstance - October 25, 2018 Here’s a new onboard video about the awesome Subaru WRX STI tuned by J-Spec Performance! 600HP for this rebuild EJ25 engine! Featuring a KAPS 6-speed sequential gearbox, a Precision Turbo turbocharger, an external wastegate and a Tomei titanium exhaust system! Leave a thumbs up for that amazing sound! Leave a comment