For ’88 GT V6 2.8L, is there any difference in quality between ACDelco BS3005 (High Performance) and ACDelco D503A (Professional)? I assume not.
Then, why are the prices so different between those two parts.
-BS3005 on Amazon & eBay, the going rate is $18.40. Amazon & eBay don’t recognize BS3005 for ’88 GT but I was able to cross reference with GM part# 1115315 and it’s compatible.
-D503A on Amazon & Rock Auto, the going rate is $42.54 (Amazon) & 37.79 (Rock Auto).
Am I missing something here?
[This message has been edited by Fiero Vice (edited 02-06-2018).]