JETTLab Pressure Test Block Off Plate Kits with High Quality Rubber Seals

Location
Alabama
I have a home made set. I use home made gaskets but you could use any gasket. If you are leaking I would think you can flip it over and use a regular gasket. To be clear, I install this sandwiched between the carb-manifold and exhaust-manifold.
 

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These were discontinued just before I needed a set of pressure test plates. I meant to make up a nice set out of aluminum but never got around to it. I took the slacker way out, grabbed some half inch plywood that was laying around and made a crude set out of that. They actually sealed with cereal box used as a gasket, but for future use I picked up a roll of 1/8" neoprene rubber which has worked very well.
 
Pretty easy to make them yourself. I still have an old Group K kit that’s just the rubber then you sandwich it between the exhaust manifold and carbs so no need for fancy plates. A made some other sizes using sheet neoprene rubber and a gasket as a template.
 
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