【Top Quality】 This setup combines CNC aluminum manifold and corner ports with 304 stainless steel line. Each kit is hand built. Aluminum blocks are offered in black anodized finish. 【Fitment】 This system bolts to ALL series LS engines. This system has been tested with the following intakes and is compatible with Holley Hi Ram, Holley Sniper, Pro-Flo XT,uper Victor, Frankenstein intakes, Victor Junior, & Stock Style Plastic Gen 3 Truck Intakes. Will fit nearly any of today's long runner style intakes. 【Function】 Stainless Steel Steam Vent System connects the 4 corners of your LS engine to remove trapped steam and get it where it needs to go. When steam gets trapped pressures rise, when pressures rise it creates an unsafe tune condition which can lead to pre-detonation, head gasket failures, lean cylinders causing piston failure etc. 【Note 1】 This kit will 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 surface. 【Note 2】 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 TB-1032