CRG Discussion Forum
Camaro Research Group Discussion => Maintenance => Topic started by: 69z28fan on June 26, 2019, 11:37:42 PM
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Can someone tell me what the correct plugs are for a 1969 396-375. Will R43xls work in this motor?
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R43 is the correct plug for iron heads. Not sure what R43XLS is, but the R43XL is used with aluminum heads. XL stands for extra long threads.
- Warren
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Made a mistake. R43 is a 302 spark plug. R43N is the correct plug for 396/375 with iron heads. R43XL is for aluminum heads.
- Warren
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Thank you.