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Focal Inside Volkswagen VW Y-ISO T-Harness Impulse 4.320 4 Channel Amplifier

Focal Inside Volkswagen VW Y-ISO T-Harness Impulse 4.320 4 Channel Amplifier - Main image
$44.79 $69.99 In stock

Category: Wiring Loom

Focal Inside VW Y-ISO Harness

T-harness adapter for an Impulse amplifier — fits Volkswagen vehicles without factory amp

Inside upgrade harness

Focal's Inside system upgrades include new aftermarket vehicle-specific speakers and subs, along with their Impulse 4.320 4-channel amp.

  • Designed specifically for your vehicle
  • Quick and easy Plug and Play installation
  • Direct link from the amplifier to your original head unit

Focal also offers a variety of cables and connectors that you may also need

  • Extension cables to connect the T-harness to the amplifier. - IW-IMP-EXT150 Extension Cable
  • Harness to connect the T-harness to the amplifier and subwoofer(s) - IW-IMP-2.2 AND IW-IMP-2.1 Harness

Check your vehicle compatibility by contacting us or checking the focal inside website.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Robert D. ★★★★★

Plugged it into my VW’s factory harness and everything matched up perfectly, no cutting or splicing needed. The T-harness design makes the Impulse install feel almost factory, which is exactly what I wanted.

John A. ★★★★★

Plugged this in behind the head unit and everything clicked into place—no cutting or splicing needed since it’s built for VWs without a factory amp. The harness fits the Impulse amp’s connector perfectly, and the sound came through clean on the first try.

Emily ★★★★★

Finally an adapter that actually fits my VW's existing wiring without any cutting or splicing. The T-harness design made connecting my Impulse 4.320 amp a clean, straight swap, and the build quality of the connectors feels solid.