ZL1 SPARK PLUGS [Archive] - The Supercar Registry

BARRY

07-23-2010, 03:35 AM

HI what are the best spark plugs for a 1969 zl1

William

07-23-2010, 03:57 AM

Standard plug was AC R43XL.

69SSZL1

07-23-2010, 02:57 PM

I use AC R43XLS. Extended tip is the difference. The ZL-1 cam eats plugs, so I change them offen.

Chevy454

07-23-2010, 04:47 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 69SSZL1</div><div class="ubbcode-body">I use AC R43XLS. Extended tip is the difference. The ZL-1 cam eats plugs, so I change them offen. </div></div>
If you're not after that "nostalgic" look, and are looking for a better plug than the AC, try an NGK...the NGK site says the standard plug is the BR5ES, which would be an R6918B-7 in a racing plug...someone might wanna double check those numbers, as I'm kinda in a rush this morning!