Hey everyone,

I'm looking to get some advice on upgrading my R53 JCW. I'm considering a tune and a smaller supercharger pulley to get a bit more power.

For those of you who have gone this route, what tunes have you had good experiences with? I'm curious about both off-the-shelf options and custom tunes. Also, what size pulley did you go with (15%, 17%, etc.), and did you encounter any issues like belt slip or heat management?

Any recommendations for reputable tuners or shops in the [mention your general location/region if you want more localized advice] would be greatly appreciated as well McDonald's Customer Survey

Thanks in advance for your insights!