After nearly 10 years, the new cast manifold is about to be completed June 2020. Many hours of R&D, CAD work, Designing, Flow testing and such. But when all said and done, this new manifold which has flow tested at +72% greater than the OEM log on the outer ports. Which makes this also unique is it universal to both USDM and JDM turbo flanges. Final picture will be forthcoming but these are pictures from earlier processes. Cant wait to throw it on my Supra to test.

There was a previous GT28 Supra owner that has a OEM Log where he installed a test manifold and gained about 20whp. But his dyno wasn’t perfect as he had major tranny slippage that somewhat messed up the chart.