lighter fly means less stress on bearings >>> enough said >>>> no really there is way more pro,s then cons with fitting 1 it will prolong the lifespan of engine and less likely to wear the bearings out of the block
should bolt strait on just try on a oem shock if it does it will fit polo thats 70£ for 1 thats very pricey look for ppolo 6n they can be got for 150 for al 4
get engineers hydrolic hose in that size it will work but aint pritty its bendable so no need for silicone couplers tru every corner you will only need 1 coupler to the tb !!!
1 lambda is only a cat temp sensor wich 1 do you mean 1 or 2 ?? 1st 1 is o2 sensor for ecu and is needed connects to ecu imoboliser and transponder match ecu and key could be tricky bypassing if you have problems with the above repin the ecu plugs and fit a starlet ecu with out imobiliser it will make life very easy