Think it's got to be a Jap spec downpipe as the uk ones are not the same size. I've got a HKS Ti-Tip Hiper exhaust so was going to go for HKS downpipe but heard there not that good (not twin dump or something) any other sugestions?. Also going to get the ECU re-maped as soon as its fitted (before anyone says BOOST SPIKE!)

 

Get the Janspeed open mouth downpipe which is perfect for the HKS Hiper (its what I use). Roger Clark can supply, we have in stock as well.

bob

 

Are you sure they will fit a Jap car? if so why does the HKS exhaust only fit the jap spec cars and only fit the UK cars with an extra joining pipe?