MSD Unilite Distributor Mechanical Advance Fits Ford V8 1981 95 302 4101XXLBK 1997 1998 GMC C7500 Topkick FIV20002 41551 OR 1997 1998 GMC C7500 Topkick Installs in Seconds Just plug the module into the OBDII port Easy to adjust mechanical advance with supplied springs and stop bushings The line of MSD 6 Series Ignitions are the most popular aftermarket ignitions in the world due to our race proven performance on the track and our reliability on the street
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