Here is the link for fiberglass Bomex style bar which is identical to the one Graysonvario has. http://www.ebay.com.au/itm/Bomex-fr...o-non-turbo-/171877732438?hash=item2804b61056
The Stillen III makes it about 1/2 - 1cm lower than a stock bar because it slots over the existing bar If you know the height of the original bar - you would get an idea