Clane422 Posted September 20, 2019 Share Posted September 20, 2019 Hi, I have some Jahns pistons and Ford rods I need identified. And what are these black things, do they go to spark plugs or tires??? Jahns 581 And rods are T487B Link to comment Share on other sites More sharing options...
sagefinds Posted September 23, 2019 Share Posted September 23, 2019 The dojigget on the right looks like a "spark intensifier" made to go between the plug and distributor and was advertised by some early aftermarket companies to do incredible things for engine performance and economy. Link to comment Share on other sites More sharing options...
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