Well the reasonable expectation of service is at least the arbitrary period of warranty offered by the (vehicle) manufacturer from time to time, which was five years, now seven. However time is not a factor under Australian Consumer Law.
Thing is Walkinshaw trades 100% on the assurance that it will match Holden warranty, hence charges an exhorbitant premium for what is otherwise known value components. And a sticker.
Walkinshaw has sold you an express warranty covering the normal operation of a supercharger in addition to manufacturer’s warranty. Clearly if use was not abnormal then with such a major failure you are entitled to remedy under consumer law.
It is not up to you to prove which part failed in which manner when, as long as the use was normal.
Depending on purchase details, like fitted when new through Holden dealer or under finance through credit provider, you may be entitled to a replacement car or refund. Seriously, you should read through the basics
here and consult an expert on this matter before forking out on a remedy yourself.
Needs to be formal and legal, not to the local franchise owner who advised they will give you replacement bits of those supplied... the POS kit blew your otherwise perfectly good Holden motor and now you are up
shit creek.
Or buy a cheap ls2 or ls3 and a reconditioned lsa blower from the USA for a supercharged beastie.
It's a shame ls2 onwards doesn't have the meat in the block to properly stroke out to a 427 like the good old LS1 does.
Dude the only way you can get a GenIII out that far is to re-engineer the crank, crankcase, rods, pistons, remove existing sleeves and replace with something like Darton. It ain coz LS1 has meat vs GenIV, quite the opposite.