I was having a nose around the underside of my car and noticed I have a Japspeed middle section. The problem is that it has a prodrive back box but is blowing at the flange between the 2. How can I rectify this ad the flange looks pretty corroded. Also is the Japspeed a standard thing on the rb5?

Sorry janspeed.

 

Janspeed is an after market system it won't be standard fit on rb5 you need to undo the flange and make sure you have a gasket in there, if the bolts are badly rusted get a grinder on them and replace, that should do the trick.