PTL

Not bad, they have a mock air filter system in the office which clearly shows the difference between the stock and k&n filter, even if you restrict the k&n it allows so much more air through. Has your engine lost 30bhp or is this a mx5 running 160bhp?

Both of them offer a remote tuning if needed, you'd have to buy an ecutek kit however, so the drive is probably the better option plus they fine tune it to your engine and not just an off the shelf remap.

Definitely worth it, especially as if you've changed the air flow without reprogramming the ecu, the car's performance may be negatively impacted if it's getting airflow that it's not expecting. Did you change the air filter too? Best to get a rolling road test done to see what it's done to the car. But well worth the smoother delivery of power. And definitely can recommend Corten-miller for service!

I think it was stock vs exhaust & retune.

Just had my GT improved with a full Miltek exhaust system, k&n filter and ecu remap. Now running 213bhp thanks to the guys at Corten-Miller, Friskville.