G'Day,
Just put a hi flow airfilter from V&H on my 08' Softail Custom. It's subtle but looks good with the big radius pipes and doesn't stick out further than the stock cover.
Will dyno it next week but don't think it will be to different to the SC stage 1 that it replaced. Paid AU$280 delivered from flyin' brian on ebay.
The badlander seat is new as well and next will be a tri-bar tail light most likely from Chicago Harley.
Cheers
Swagman