Melted Plastic bit....

[ashc]

yep 4mm for most things, some 3mm hoses too i think (internal diameter) and one metre of 5mm or so required i think if i remember correctly. Any larger ones you replace check there aren\'t any restrictor \'pills\' in there and careful not to kink any, the sillicone is more prone to this than the tougher rubber ones. Might be worth getting some viton check valves too whilst you\'re at it.

[JohnP]

where can i get those check valves! pwease.

[jackaleks]

Cole Parmer

[JohnP]

thanks you

[REVIT93RX7]

The SS lines seem to be the way to go, however I have known a number of people that have run them, and have removed them.  The main reason is they rub against the sensor harness, eventually leading to rub through and causing faulty sensor issues.  For race applications it\'s not an issue but for street driving it could be a problem.