Not sure about which pipe performs where, but:
Long manifold = Better bottom end, less top end power and RPM
Medium = good all round
Short = less bottom, more top end power and RPM.
Car-less (Velox V10 or 733) // RB T10.5"+" (JB Modified) // Bluebird BMS-990DMG (St) & BMS-631 (T/B) // ATS 16% // Capricorn Wheels // Protoform
"70% of the time, it works ALL the time"