The only drilling/cutting required with be of interior fixtures and fittings.
IMPORTANT!! - The belts we previously sold (now obsolete) were fitted with a foam block to stop the belt retracting too far into the body and jamming the reel. The replacements dont come with this foam block. Dont let the belt retract into the belt too far, it will jam. We suggest folding the belt a few times and securing with a clothes peg or similar whilst fitting to prevent the belt retracting.
Starting point - VW T3 Westfalia California, note how the rear pillar trim over laps the lower trim panel.
Drill out the factory pop rivets for the rear mosquito net to allow removal of trim panels.
Once you have taken the trims off, remove the shoulder loop mounting blanking screw from the mount with a #3 Philip's screwdriver.
From the lower trim panel, remove the panel clips that are adjacent to the lower belt mounting as they will no longer fit.
Fit the inertia reel as shown, take care to tighten the bolts fully, we use thread locking compound. Please also note the piece of card behind the retractor to stop bit of insulation getting jammed in the mechanism. Also worth mentioning is the angle of the belt... approx 7 degrees towards the rear.
Drape the belt over the trim panel, then use some packing to stop the trim clipping all the way back on, this will leave room for the belt to exit the panel and not get caught. From the factory there was a rectangular aperture cut from the panel and a plastic trim piece fitted but these are sadly now obsolete and this is the neatest solution.
Attach the shoulder loop to the body of the van as shown, use a wavy washer and a stepped spacer, and then another spacer to clear the interior trim, you will need to loosely fit the pillar trim first.
The lap mounting can be found tucked in the corner, under the seat. Seen here just below that "special" wiring.
Once you have fitted this mounting you can now remove the piece of foam that us used in manufacture to stop the belt retracting too far.
The mounting of the buckle end needs no further instruction, if you got this far we are sure you'll work it out!
Fitting the bolt cover to the shoulder loop.
Refit the lower trim over the upper one to leave a gap for the belt to exit.
All that is left is to re-rivet the mosquito net poppers back on.
A diagram of how VW did it, notice that our bracket is a single piece design, and not a 2 piece item like theirs, also note that we have removed the sharp internal angles between the welded brackets to strengthen them.