Thanks for that, Your quite right jamie, L1 as opposed to L6 ecu fitted and very basic.
So in other words if i bought an rs500 back then i'd have had to change the ecu regardless as i don't see an L1 ecu properly fueling a 500hp engine.
I wonder if any tuner actually tried to use that same ecu to up the power or did they rip it all out and fit other systems?
Does any one remember the diameter of the downpipe?