One comment on “Vauxhall Astra J GTC 1.6T (180PS) Superchips ECU remap gains 20bhp!

  1. Get on and do the 1.4 140ps as soon as you can. Understand the GTC is different from the 5 door J engines – hopefully you will get a vehicle to check out and create a new map. If you can boost my BHP by 20 and the torque by 40nm I’d be delighted.

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