Focal Inside VW Y-ISO Harness

Focal's Inside system upgrades include new aftermarket vehicle-specific speakers and subs, along with their Impulse 4.320 4-channel amp. Focal also offers a variety of cables and connectors that you'll need, including: This T-harness provides the upgrade connections between your select Volkswagen vehicle and a Impulse 4.320 amplifier by way of the appropriate extension cables (see below).