We have worked closely with our tuning guys DWR here in the UK and have a very sweet ecu map that he installs that works brilliantly with our full H2R type system. This ecu map provides just over 250hp at the wheel when combined with our system.
Our fully polished SS system with repackable H2R type rear can is £2200 plus VAT(none if exported) and £100 shipping.
The 2 options we run are either replacement rear H2R type can or full system.
We are building several full systems for fellow H2 owners currently and there is a mix of some reflashing ECU's (like mine) and others not. Equally I have several guys just fitting the H2R type rear can (£1000 plus VAT)
Our system is a proper 4 into 2 into 1 unlike the OEM 4 into 1 which creates a far from ideal exhaust gas flow.
Currently we have a 4-5 week build time from order. We do not envisage any warning light issues.
How much for the full exhaust system. Are there different muffler options? Will I need to get an ECU reflash or pcv? Will adding your exhaust cause a warning code on my display by disconnecting the servo cables?