I like the idea of an H-4. While I do love my 4ag I think equal length headers on the flat four will produce a great sound especially if they up the rev limit.
I have seen subaru's with 9k rpm limits, weather they built the motor for that purpose is unknown to me.
Does anyone know when valve float occurs in the current 2.0 boxer?
500rpm below that would be safe and well within DD limits.
Also note that most (90%) of subaru's that are being tuned and the sounds we hear are turbo cars. If you turbo any engine the exhaust note is different so don't be scared.
It would be great if toyota would put in a traditional I-4 or even better an I-6 but the low CG is what will make this car I think.
Like some other forum member said, low CG is the new crack!
I have never heard a flat 4 with ITB's though....that prolly sounds like heaven!
Just found a vid....ITB's SNARL ON A BOXER