Recently I installed the HPA K04 kit. A easy straight forward install. Nothing crazy as long as you use the washers appropriately so you don't leaks!
On to the tune, I was originally REVO at stage 2 but was told the K04 upgrade was going to be full price. I also didn't like the peakiness feeling of REVO. Instead of that I decided to go with United Motorsport's K04 tune. Probably the best decision I have ever made! The tune is silky smooth with great power through the entire power band. Driving this as my daily, it was important that the drivability is there and it definitely is. The tune is still on the low boost tune which is 21psi because I don't have the 4 bar MAP sensor. Even only at 21psi, the power is ridiculous.
On to the tune, I was originally REVO at stage 2 but was told the K04 upgrade was going to be full price. I also didn't like the peakiness feeling of REVO. Instead of that I decided to go with United Motorsport's K04 tune. Probably the best decision I have ever made! The tune is silky smooth with great power through the entire power band. Driving this as my daily, it was important that the drivability is there and it definitely is. The tune is still on the low boost tune which is 21psi because I don't have the 4 bar MAP sensor. Even only at 21psi, the power is ridiculous.