So, i finally got around to this and have had the HM headers fitted, along with a freer flowing muffler, from a VRX

*** Big thank you to the fellows at MitsFix; Mal, Brendan and the rest of the team!
Fantastic job with no complaints at all. ***

Very first thing i noticed was how much quieter the car is - Headers paid for themselves on that point alone for me!
The new muffler can be a bit boomy in high gear at lower rpm, especially when going up hill... the AWD loves to stay in higher gears, but its not enough to bother me and even sounds quite sporty sometimes - for a boat that is.

There has been an improvement in how the car feels too, doesn't feel like its "holding back" anymore. Picks up very well from standstill and even overtaking at 100 k's feels effortless now.

GF commented on the quieter ride too and told me she expects me to stop complaining now, heh.

I'm very happy and can now appreciate the extra gear over my KH. The KH pulls well but can be slow while building up revs in 2nd gear whereas the 5 speed feels quicker through the range.

I highly recommend the headers to all the AWD drivers.