Re: k04-01 -- k04-15 -- k04-20 DIFF'S? (96steeda)
K04-001 and K04-020 are both for transverse-engined applications and require
different exhaust manifolds (bolt pattern differences for each turbine housing). K04-001 will bolt directly to OE Golf/Jetta 1.8T exhaust manifold; K04-020 will not without changing manifold and other expensive downstream components (parallel cats anyone?
)
K04-15 is for Audi A4 and Passats (longitudinal engine).