Dude, did your cousin buy the E-Manage from *** ?
Did it eventually get installed OK by them ?
I obviously don't know the full story here, but I work with Computers and IT - And there is no-one person that knows everything about everything - Sometimes we have to read the manuals - Sometimes we have to download the manuals too.
Say for instance, my customer buys new bit of computer hardware or software and he wants me to install it - And I don't know anything about this new bit - I got to read the manual right ? Maybe I have to download the manual cause the manual didn't come with the new hardware. Guess what - I charge my customer for this (however I might discount my rate a little because I am learning about this new bit -) But he asked me to install it right ?
I'd reckon it would be the same with car stuff too.
Did you ask John for a breakdown of the costs ? Did this include a tune, wiring, physical installation, etc ?
Not knowing exactly was done here it's hard to make a judgement - You say 'full set of Greddy E-Manage' - does this include the Fuel & Ingnition ECU, Boost Control, etc ? Cause it looks like it ! If so, I would say your cousin got a good deal ! Actually, a fantastic deal !