TRUE OR FALSE with RB's:

S3 S5 S7 WS7 : all have same crankcase, bearings, conrod.

S5 S7 WS7: have the same crankshaft, the WS7 has a hardcoating

WS7 turbo head: fits the S engines

RB & Novarosi plugs are the same


If parts are interchangeable then we can rebuild boken RB's with S5's and S3's for cheap.