|
Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
|
None. You may get better combustion and fewer emissions.
FWIW I use NGK BPR6ES, just a little longer lasting and maybe a better spark.
If you want a little better performance, replace the wires if old, new air filter and check the compression.
If the previous records do not show any engine work, a new head gasket and a complete valve job will give you a little more power.
GL & welcome.
J_AZ
__________________
1988 924S, 85,750K ..+ 1987 924S, 154K DD (+15K est. bad odo)
|