After driving the A90 Supra with our top mount kit I immediately fell in love. The A90 is a freaking monster with the EFR turbo. We put a 9180 which is rated at 1000hp. We have maxed out the fuel system so it's getting worked on for a solution. Originally I thought it was going to be extremely laggy but this fucker is a monster. Boost comes on so strong I had to double check to make sure I had the right turbo installed. After checking sure as shit it was the 9180 installed. Raced an N54 with a DOC PTE6266BB and the 9180 spools WAAAAY faster! The 9180 is comparable to the PTE6870. I owned a PTE6870 and I can tell you we're talking at least 1500rpm difference. I loved the setup and feel so much I had to make sure other B58 owners could experience this. We are now in development of an EFR top mount turbo kit for the BMW B58 F chassis! We are going to list these at or around $5000.