Sinister Diesel SD-INTRPIPE-6.0-KIT Exhaust Pipe Construction - Aluminum Product Design - Mandrel Bent Tubing Performance Notes - Mandrel Bent for Minimal turbulence and Maximum flow Kit Includes - (1) Cold Side Charge Pipe, (1) Hot Side Charge Pipe, (4) Silicone Boots, and (8) Stainless Steel Spring Clamps