This Z1 Stainless Steel Intake Hardpipe kit comes with HKS Blow Off Flanges welded directly to them. You can choose to purchase with or without our 4 ply silicone couplers in Black, Blue, or Red.

Included in this kit:

• HKS BOV Flanges welded onto Z1 Stainless Steel Hard Pipes
• (4) Silicone Caps to block off factory Recirculation Valve Ports
• Optional 4 ply Silicone Couplers in Black Blue or Red
• Optional Stainless Steel Hose Clamps or Stainless Steel T-Bolt Clamps 

Please remember to use a lubricant when installing the couplers on the pipes & installing the hard pipe kit.  A silicone spray is best which is very slippery and doesn't make a mess like grease.

Trying to do it without this will result in frustration and likely damage the couplers.