Eventually, this causes the raised sealing beads around the coolant ports to lose their seal and leak. But, as we found out with the passage of time, some of these fancy intake manifold gaskets didn’t hold up very well.Īfter 60,000 to 70,000 miles, many of these carrier-style intake manifold gaskets develop coolant leaks that can cause an engine to overheat or even fail if enough coolant gets into the crankcase.Īpparently, the nylon-filled plastic used in the carrier is being attacked by the coolant, causing it to soften and deform.

These “high tech” intake manifold gaskets were much more sophisticated (and expensive) than their predecessors, and seemed like the perfect solution for a difficult sealing job. The carrier itself (or steel grommets inserted into the carrier) prevented over-torquing by limiting crush when the intake manifold bolts were tightened down. These new style intake gaskets also had a nylon-filled plastic carrier that formed the body of the gasket. When the intake manifold bolts are tightened down, it deforms the raised sealing beads and presses the beads tightly against the surface of the head and manifold to seal the joint. The solution some auto makers chose to use was a new type of intake manifold gasket that had raised synthetic rubber silicone beads around the intake ports and coolant passages. This created a sealing challenge in areas where different materials with different thermal characteristics and different corrosion characteristics were bolted together.

Plastic became a popular material for casting manifolds due to its low weight and cost.ĭuring this same time period, cast iron cylinder heads were replaced with ones made of aluminum to save weight. Some were also fitted with tuning valves that could reroute air inside the manifold to change air velocity and flow according to engine speed and load. Manifolds became more complex, with long curving runners and intricate plenums engineered to improve throttle response and low speed torque. Hose /li /li.This gave engine designers more freedom to optimize airflow. li li Includes Vacuum Port Fittings li (1) 1/8 in. The use of some aftermarket cylinder heads may result in port misalignment. Thick /li li Throttle Body Opening 102 mm /li li Fuel Rails use -8 AN ORB Fittings /li p Note – li This intake is designed to work with stock LS heads. li li Rear Intake Bolt to Intake Rear -0. li li Front Intake Bolt to Intake Front 5. Fabricated Intake Manifold li GM LS1, LS2, LS6 li Accepts 92 mm or 102 mm Throttle Body li 2200-6800 RPM Power Band li Black Aluminum with JEGS Logo br Includes li Vacuum Port Fittings li Fuel Rail Kit li Intake Seals li Hardware p Note Works with LS1 and LS6 Style Injectors. MSD is poised to deliver components that work and communicate together to provide performance and value.

Our DynaForce Starters and Alternators ensure that your engine cranks over to fire up and the Alternators keep it charged. The Atomic EFI systems for the LS engine platform and throttle body are now complemented with a transmission controller. Today MSD is developing electronics for your entire powertrain. From super speedways to road courses, land speed racing to top fuel dragsters, and of course your traditional hot rod, MSD has provided the components to fire nearly anything in motorsports.Įarly on, MSD focused squarely on ignition systems with revolutionary products like the multiple sparking CD ignition, timing and rev controls, billet aluminum distributors and the Pro-Mag, an incredible breakthrough in power and endurance. Over the course of 40-plus years, MSD Performance has been driving the development of innovative components that helped shape the way our cars race and perform. Racers never stop experimenting as they search for every way to wring out more power or handling performance to to gain an edge over the competition. The intake bolts on and is supplied with new gaskets and hardware for a direct bolt-on package. Atomic AirForce accepts an OEM or 103mm throttle body as well as stock or aftermarket fuel rails including MSD’s Atomic LS EFI system. The unique bell-mouthed runner entrances maximize airflow and minimize shrouding – all while optimizing the available plenum volume for an unobstructed flow path over opposing runners.

5.3 intake manifold