Feature:1. Wide Application: This cool crossover kit is suitable for all engines of LS series, such as for LS series LS1 LS2 LS3 LS6 LS7 LSX Engines.2. Compatible Air Intakes: Replacement for Holley Hi Ram; Replacement for Holley Sniper; Replacement for Edelbrock ProFlo XT; Replacement for Edelbrock Super Victor; Replacement for Frankenstein and more.3. Function: When steam is trapped and pressure builds up, this can lead to pre explosion, head gasket and piston failure, and more. Our kits hook up the engine, remove trapped steam and send it where it's needed.4. Exquisite Workmanship: CNC aluminum manifolds and corner ports combined with 304 stainless steel. Each kit is handcrafted. The aluminum block is black anodized.5. Easy Installation: The coolant crossover steam vent kit fits almost any running style air intake today, easily attaching to all modified engines.Specification:Item Type: Coolant Crossover KitMaterial: Stainless Steel, CNC AluminumFitment: Fit for LS series LS1 LS2 LS3 LS6 LS7 LSX EnginesCompatible Air Intakes:Replacement for Holley Hi RamReplacement for Holley SniperReplacement for Edelbrock Pro-Flo XTReplacement for Edelbrock Super VictorReplacement for FrankensteinReplacement for Edelbrock Victor JuniorReplacement for Stock Style Plastic Gen 3 Truck Air Intake.Package List:1 xCoolant Crossover Kit 1 x Roll of TapeNote:1. This kit will clear factory knock sensors on Gen 3 engines.2. For 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 surface. 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 bit.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.