Features: 1.Universal Applications: Coolant crossover steam vent kit can be used for all LS series engine, such as LS1 LS2 LS3 LS6 LS7 LSX Engines. 2.Compatible Air Intakes: Replacement for Holley Hi Ram; Replacement for Holley Sniper; Replacement for Edelbrock Pro?Flo XT; Replacement for Frankenstein, etc. 3.Function: When steam is trapped and pressure builds up, this can lead to pre blowouts, head gasket and piston failure, etc. This kit hooks up the engine, removes the trapped steam, and delivers it where it is needed. 4.Exquisite Craftsmanship: CNC aluminum manifolds and corner ports, combined with 304 stainless steel, and the aluminum block is black anodized to ensure long lasting. 5.Easy Operation: Coolant crossover steam vent kit fits almost any running style air intake and can be easily attached to all modified engines, perfect replacement parts. Specification: Item Type: Coolant Crossover Kit_x000D_ Material: Stainless Steel, CNC Aluminum_x000D_ Fitment: Fit for LS series LS1 LS2 LS3 LS6 LS7 LSX Engines_x000D_ Compatible Air Intakes:_x000D_ Replacement for Holley Hi Ram_x000D_ Replacement for Holley Sniper_x000D_ Replacement for Edelbrock Pro-Flo XT_x000D_ Replacement for Edelbrock Super Victor_x000D_ Replacement for Frankenstein_x000D_ Replacement for Edelbrock Victor Junior_x000D_ Replacement for Stock Style Plastic Gen 3 Truck Air Intake Note: 1. This kit will clear factory knock sensors on Gen 3 engines._x000D_ 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.