Skunk2 Pro Series Intake Manifold Black - 2006-2011 Honda Civic Si K20Z3 - 307-05-0325 1.5" to 1.75" NS4-HDSS kit features ACT's most

NS4-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc

Bolts the Subaru case halves together

TIG-welded intercooler features a more robust bar-and-plate construction for better heat dissipation characteristics

Clutch Disc: 4240008-2

covered status light and test button for enhanced splash resistance and mounting tabs

Skunk2 Pro Series Intake Manifold Black - 2006-2011 Honda Civic Si K20Z3 - 307-05-0325 1.5" to 1.75" NS4-HDSS kit features ACT's mostSkunk2's engineers went back to the drawing board when they set out to improve the already popular 06 11 Civic Si's RBC intake manifold. Each of Skunk2's Pro Series Intake Manifolds for Honda's K series engines feature larger plenums and shorter, oversized runners when compared to the RBC, and are cast with thicker wall material, leaving room for further porting for high horsepower applications. Instead of producing a manifold with a significantly