Skunk2 Ultra Series Race 1-Liter Intake Manifold Plenum Spacer Silver - Honda B/ K-Series - 907-05-9001 91mm FM8-SPSS kit features a Sport

FM8-SPSS kit features a Sport pressure plate for a nice upgrade

Civic Si (FC1/FC3 Si) – (10%-30%) Reduction

ESTER Core® Technology features optimized polarity for maximal adherence of the oil film to increase engine protection

The harness comes wired with the provisions for the OEM K-Series 02-04 Wideband o2 sensor and an OBD2 port

Reduce Rotational Mass by 4 lbs Over Stock

Skunk2 Ultra Series Race 1-Liter Intake Manifold Plenum Spacer Silver - Honda B/ K-Series - 907-05-9001 91mm FM8-SPSS kit features a SportThe Skunk2 Racing Plenum Spacer is used to increase the internal volume of the Ultra Race Intake Manifolds by 1 Liter. Includes: Billet Aluminum Spacer Longer Socket Head Hardware Gaskets