by Andrew Kerr
Date Added: Friday 01 July, 2016
This is simply the best upgrade you can make on a MX5. Quick arrival, easy to fit, marked improvement in smoothness of acceleration across the rev band, slightly more torque and I think slightly improved bhp.
I was not expecting to this but it really is good on all counts.
You will not notice that much change in engine tone at all, so if you are after sound improvement you'll need to look at exhausts.
Great product, really pleased!