Nope. AUQ
does not have oil squirters, unless there is a special version made just for Denmark which has. Mine didn't, when the workshop removed the pistons (to change the piston rings) they found none. At least they also took the opportunity to fit the IJ crank scraper back then
AUQ, ARY, AMK, BAM and all codes of 1.8T with 180bhp and above have forged crankshaft and pistons. Some 150bhp codes have cast crankshaft, but none had been fitted on any Leon ever made. Audi A4s (150bhp and some 163bhp) made for the US market (can't remember the codes) have a specific cast piston not found on other 1.8Ts.
Also the injectors for AUQ and AMK/BAM are different, larger in the latter case.
Pistons are different in AUQs and AMK/BAM, 9.5:1 compression in the first case and 8.9:1 in the latter, to better withstand high boost without detonating. All pistons have been tested in drag-racing Audi TTs up to 700bhp and they held.
Exhaust manifold made for AUQ does not fit AMK/BAM and there can be found no headers for K03-052 turbos, unless you can build them yourself. The K04-023 can fit a header.
BTW most aftermarket inlet manifolds are made for left-side inlet (AMK/BAM) and not right-side (any 150/180bhp 1.8T).
And last, as Issam from INA Engineering once said, no 1.8T rod is safe above 330-350bhp, on any serious big turbo kit - "300 is safe. 350-360bhp is quite risky. Hit 400bhp and you can kiss your rods goodbye".
The fact that people can run almost double stock power on stock internals 1.8Ts is proof of VAG build quality
~Nautilus
PS I had to learn all the above by book and also the hard way because I have been trying for almost 7 years to maximize power and driveability on stock K03-052 turbo. People who can afford to change all ancillaries for a big turbo kit usually disregard the small bits.
