Does anybody on here no the internal diametar off the vac pipes that come off the n75 valve pritty sure its 3mm but could somebody just verify it please

I bought 3 and 4mm

Ended up using the 4mm but both will fit

Is the 4 a tight fit? U use just the 4mm for all the vac lines from the box?

4mm wont go anywhere

If you want a really tight fit and are using silicone then 3mm will slide over too.

I have used 4mm mate

What pipe have u both used? Have u got a link?

Silicone pipe from psi tuning mate don't know hhttp://http://www.psituning.com/product.php?xProd=19207

Got mine from ash hoses via ebay

 

http://www.ebay.co.uk/itm/170706728619?var=470042642916&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649