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I am chasing a little info on the Kaemari/Harada manifold verses Jenvey Manifolds. Currently building a L28 F54 Stroker (88.5mm bore and 83mm V07 Crank). I have a 39mm port size on the N42 head and I am going to use the Tapered 52/50/48 ITB's from EFI Hardware with a Haltech Elite 750 (unconfirmed). Most likely when I get the Inlet Manifold I will finish off the port size to match them for even flow.. The inlet manifold and head will get flow tested to ensure even CFM per cylinder. A custom tuned length set of Headers will be built by a good friend who is a race engineer. This engine should conservatively put around 220 to 230 RWH as I am keeping it relatively mild ie its not one of LCR's Ferrari Engines. Kaemari/Harada manifolds come in both small port and big port versions. The Jenvey Manifolds have a large port, 50mm at the Inlet and 40mm at the head. Does anyone know what the port sizes of both versions of the Kaemari/Harada are? I Haven't seen one in the flesh as yet to measure them. I can buy the Jenvey direct for the UK but they are not cheap at around $750+ plus shipping and they are a big investment. I think the Kamera/Harada are a little cheaper, what is the best way to obtain them and how much? Any help from the L series boffins will be appreciated.