I got my HKS system fitted the other day. It looks and sounds great!
Garage-D added a downpipe and engine and gearbox remap and the results are fantastic!
The difference is like night and day on my UK car.
40mpg is easily achievable (although misses the point of having a Supra a bit). My commute is 212 miles each way and driving slowly, without traffic I could be close to doing the round trip on a tank full. Itād be pretty boring though.
The benefit with the piggy backs are you can take them off before the car goes to the dealer and they are none the wiser.
However, a custom remap tunes to your car will usually give better results but is more costly, not as easy to find.
I had an A35 AMG and the wife had a Rav4. She got rid of the Rav and took the A35 when I got the Supra. We've also got a Hilux that is our 3rd daily driver.