Instruct: Classify Amazon reviews into positive or negative sentiment
Query: FAILED / JUNK IN LESS THAN 40 DAYS

POSITIVE RESULTS LASTED FOR ONLY 2 WEEKS, THEN INTERMITTENT FAILURE. VERY QUESTIONABLE PRODUCTI installed the 8226 on my Camaro, 1990 305 tbi.I noticed improved control and more precise response, especially within the higher RPM range. Paid $39 at local parts store, in July of 2010 for this coil. PERHAPS IT WORKS BETTER AND LASTS LONGER WITH 6AL, I DONT KNOWI realized the stock coil brackets must be modified (grind down the central area) to make this fit below the air cleaner housing, or if no grinding is performed, there must be a spacer installed to allow proper clearance between air cleaner housing and the coil. I took this chance to install a 1/2" TBI spacer on the intake manifold, which gave me plenty of room for the raised height new coil. (i did not grind brackets, but know those who have...)THIS PRODUCT generates voltage advertised when used with the MSD 6 or 6al ignition box.edited to provide warning and info on my products failure