Originally Posted by Venom
I can't say for sure why that is, but that's what he has confirmed for me in person and by changing that by-line on their site. If you want you can ask them via email: email@example.com
It was the guy from Wagner-Tuning UK that confirmed it, and the WT-UK website still has the caveat on the webiste saying 'may need ECU coding to avoid CEL issues'
WT-UK were offering a VERY CHEAP offer to be the first in the UK to have one fitted by them on a 135, but the handful of those of us that were interested in doing so all baulked when they wouldn't guarantee no CEL.