There's a number of signs that your classic Corvette could use a spark plug change - trouble starting, hesitating, cutting out, sluggish engine performance, loss of engine power, decreased fuel economy, lack of acceleration or loss of speed under load, just to name a few! When it's time for a change, this1958-1969 ACDelco Gold Professional R43 Spark Plug is the perfect choice for reliable performance.
Each plug is pre-gapped to 0.86mm (but it never hurts to double check before installation) and features a high quality copper core and outstanding suppression characteristics that deliver reliable performance. Get your Corvette firing and running smoothly with the dependable performance only ACDelco plugs can provide!
ACDelco