Unless there was good reason to suspect a chronically dirty engine which, in the average range of kms these cars have done and given modern clean fuels, the best oils in history and good filtration, I would very much doubt, I would avoid dumping any product in a semi-uncontrolled fashion into the engine. Engines are designed to have only three things in them: oil, fuel and coolant.
Most of these after-market additives and so-called cleaners are designed to do only one thing: part the gullible from their money. The more propellant and the less actual "product" whatever that may be, the better their margins.
If I was an engine "cleaner" manufacturer and I wanted people to be really satisfied with my product, I would ensure that it generated as much smoke as possible upon combustion, so the user had some measure of "satisfaction" that "all the gunk has been cleaned out".
The manufacturer of your particular product obviously overlooked this little marketing tip and/or you do, in fact, have a perfectly clean engine as I would expect, and it was probably clean before you started the process, when you were around $15 richer.
The negative, however, is that redlining an unloaded engine has probably wiped some life off it.
CP_e Standback & PNP; CP_e 3" SS Downpipe; Corksport FMIC with Top-mount K&N filter & OEM Ram CAI; Turbosmart BOV; Dashhawk; Prosport Boost Guage; JBR solid shift bushes; DBA 4000 Wiper-Slot front rotors; Hawk Ferro-Carbon HPS Street front brake pads (@ 69,000km); Sumitomo HTRZIII's in 225/45 x 18