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The Sierra 18-2125 restores factory-clearance engagement
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Constructed from mandrel-bent aluminized steel with 3
allowing for more aggressive ignition timing and higher boost levels without detonation
Install it on the fuel rail
MSD Ignition 8226 MSD Blaster GM Coils Carburetor Accelerator Pump Tuning Kits The Sierra 18-2125 restores factory-clearanceThe MSD Ignition 8226 Blaster GM Coil is a direct high performance replacement for GM HEI ignition coils found in millions of Chevrolet, Buick, Oldsmobile, and Pontiac V8 engines. It's the simplest and most cost effective ignition upgrade you can make for any GM vehicle with a factory HEI distributor. This coil produces 45,000 volts of output with a secondary voltage rise time of only 15 microseconds significantly faster than the factory GM coil.
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