non custom means no sun roof no elecy windows etc.! so there for lkighter & better for track!

i think u might b slightly confused to his term of custom 7 non-custom Si!

they basically did a s1 custom whihc had sunroof & elecy windows central lockin etc & then they did non-custom models where u got bugger all!

non-customs r some what rarer & now more expensive to buy!