procomp electronics procomp motorsports sold poor quality rocker arms that failed in 500 miles, would not stand behind product. rialto, California

purchased aluminum roller rocker arms from procomp motosports they sat on the shelf for a while then i assembled the engine and used these rockers they lasted less than 600 miles and began to crack around the roller 10 out of 16 cracked, thank god i caught this before it destroyed the engine. im not a back yard mechanic, i was an automotive machinist for 40 years served an apprenticeship with state of  california metal trades assn. there was no misuse of parts just faulty parts, i sent the parts back to pro comp these parts are supposed to be life time warrnty or close to it, i sent these parts at my expense, they told me they would not warnty these parts because i didnt keep my reciept, i buy hundreds of dollars of parts every month so i dont keep tract of them. but these parts are like brand new, i still have 1 cracked one and 6 that havent cracked yet. if any body wants to know about this company, and do they stand behind their parts, thats a big NO. if it costs you another 80 bucks for a set of rockers pay it, thank god i learned a cheap lesson. cheap parts aint good, and good parts aint cheap. g