space is the bugger
not gonna get 2 fan performance from a 1 fan rad
(and push-pull is for fools)
Swiftech does sell such, though for 3/8" ID systems
http://www.swiftnets.com/store/produ...asp?ProdID=175
$45 including everything (except fans), 0.204 system C/W with Swiftech pump/res/fans
no, its the bling bling that sells the DIY market - performance is secondary
sorry