here's the spacer, TFS-51520004 , a cotton canvas phenolic 15"x4" board worth about $20 in uncut form. It's not the best material for a spacer, but it is strong and is still considered a great thermal barrier.
anyone else running one?

Bringing the torque curve lower in the rpm range?baja-chris wrote:Also using a spacer vs not using one makes the intake path longer which lowers the optimal rpm range of the intake.
Yes, in general (vs no spacer).Rmc wrote:Bringing the torque curve lower in the rpm range?baja-chris wrote:Also using a spacer vs not using one makes the intake path longer which lowers the optimal rpm range of the intake.