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The Speedmaster universal 21 circuit harness can be used in any vehicle application
Aluminum pressure relief valve for 6-71
Speedmaster freeze plugs will not rot out
Get all of the performance that your engine can produce with these durable pushrods designed especially for high-lift cams
If your vehicle is using aftermarket components
Pontiac 326 400 455 Flat Guide Plates (5/16" Pushrod - 7/16" Stud Hole - 1 Pc.) The Speedmaster universal 21 circuitYou need guideplates to keep your pushrods from deflecting under high rpm conditions. That's just what our Speedmaster guideplate sets do, they are made from 5140 Chromoly steel, nitrided and black oxide coated for corrosion and wear resistance.
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