Feature: The stainless steel steam exhaust system connects the 4 corners of the engine, and the hose connects all the fittings together into a complete comprehensive kit to remove steam and send it where it is needed. Compatible with - For LS1, , LS3, LS6, LS7, LS9 LSX This kit is connected to the engine, which can effectively remove steam and send it to where it is needed Note: This kit clear factory knock sensors on Gen 3 engines. LS3 L92 and other heads have the rear ports blocked off. This block off is a simple aluminum plug. You can knock this plug out from the bottom out (if heads are off) with a punch. It can also be carefully drilled out as our corner blocks seal off the top flat . DO NOT enlarge the hole size overall. Care must be taken to not let aluminum chips fall into the head passage so we suggest multiple careful drills with vacuuming in between and possibly greasing the drill bi Color:Silver & Black Material:Stainless Steel Package Contents: 1 x Coolant Crossover Steam Vent Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.