Not intending to try and sell from the forum, just to clarify. We are a group dealership in Cornwall. We have Renault, Mitsubishi, Seat, Suzuki, and the defunct MG Rover Franchises.
For the past 18 months we have been selling and fitting a Power Upgrade product called P Box, Manufactured by a Austrian Company called Steinbauher.
Each box is manf specifically to fit each model of car and plugs into the wiring loom of the vehicle. No wires need to be cut or modified, it simply "Plug and Play"
The unit for the Kia Sorento increases the BHP from 140 to 169bhp and a torque increase of 343 to 410nm, quite an improvement.
The manufacturers warranty is only affected if a fault can be attributed (caused) by the fitting of the 'P-Box'. In our experience we have fitted in excess of 600 units and have not experienced any issues whatsoever.
I have a box fitted to my Renault Espace lifting the bhp from 176 to a respectable 212bhp, I have never experienced a single problem and tows our Abbey perfectly.
As mentioned in an earlier post if you 'hammer' the vehicle you will use more fuel, if you drive conservativley, and use the extra BHP to pull you over the hills and along the flat you will see an increase in fuel economy of approx 10 - 15% (we have carried out our own trials on identical Hymer motorhomes)
Insurance: Again in our experience, You must inform your insurers in writing. We have never yet known an increase in premium through the upgrade being fitted, but you MUST inform them of any upgrade to your vehicle, even a set of alloy wheels!!!
Lots of other upgrade manufacturers boast enormous increases in bhp, again experince tells us to steer well clear of these products. The power they deliver far exceeds the vehicle manufacturers tolerances and can cause serious problems with the vehicles Drive Train.
Every Steinbauher P-Box is manufactured within the vehicles tolerances, so does not exert extra stress on the drivetrain systems.
Sorry, but ive got to put this in, as I could go on forvever, if you do require a brochure or more info feel free to email me direct at spe@dalescornwall.co.uk