Originally Posted by
Snoopy
stock b18c5's and itr b18c's engage at ~5800. b18c1's engage at 4400.
go ask anyone who really know's their b18c1. oh wait, that's me. :wiggle:
Werd, Snoopy is always on key.
The b18c1's low engaugement point is to compliment the dual stage intake manifold. Usually when you upgarde to a S2, or like single stage manifold the crossover must be raised.