I believe FLI is an outstanding shop for dyno-tuning, and Subaru mechanical. Unfortunately, I would not recommend them for custom work on other makes how ever. When planning my project car, I bought a Link G4 ECU from Miles. Once I got the car to a certain point I brought my SR20DET swapped Datsun 510 to FLI to have the ECU, and new s13, (E5 ECU) Wiring Specialties engine harness installed. I also hired them to install the fuel lines to and from the fuel cell, regulator and rail. The intent was to get the car running and tuned so I could finish the rest of the build.
Along the way I was told that the brand new harness I had was a mess and needed to be torn apart and fully tested. During testing they reported the $500 ignition chip was fried, but months later said it was OK. All of this took a huge amount time (over a year in fact) and cost 3X their original estimated. I asked Miles on several occasions to contact Yury at wiring specialties so he could help them figure out the problem, but time and time again Miles refused.
In the end we had spent over $12,000 on FLI's work, but they still hadn't got the car running, or tuned. They assured me they would have it running by a specific date, but then reported the #1 cylinder had a leak down of 80%, which meant the engine was shot and needed to be replaced. I knew this cylinder had a compression of 170 psi. when I tested it, so I felt this didn't add up. I asked Miles to start the car so I could see what it was doing, but he refused saying it would damage the engine. I immediately took the the car to another shop who found the ECUs fuel map for the 1000cc injectors were off by 300%, the engine ground wire was left disconnected, the starter wires were only finger tight, fuel lines were leaking, and they found a foreign metal object in the #1 cylinder. 20 minutes after pulling into this shop, the car was running smoothly on all four cylinders with no smoke at all. Almost two years later now, the car is boosted to14 psi. and still running strong today.
In the two years sense I've found many other issues. I also discovered the real reason they were having so much trouble with the wiring harness. FLI had re-pinned a bunch of wires on the harness ECU plug and gave me a printout of the plug showing the changes they made. When I compared these new pinouts to a s14, J5 ECU pinouts they matched, and it was obvious they had uploaded the wrong base map to the Link ECU. Instead of confirming the map and correcting it, they blamed Wiring Specialties' product and spent hours blindly testing, taring it apart, and reconfiguring the harness so it would fit the wrong map. Had FLI uploaded the correct map and followed the instructions on the bag, it would have taken only four wire splices to hook the harness up and get the car running.
I believe FLI's intentions were good, but they sold a job they were ill equipped to do. Unfortunately they quickly found themselves in the unfamiliar territory of being in over their head, and not knowing what to do. I think Miles and his crew are very good at what they know, and I don't think my experience is the norm. It is still a very bitter pill to swallow to have gone through all this without so much as "I'm sorry" from anyone at FLI..