Chief IMO;
if you have the budget, go for Bosch
if you want to be practical, NGK
Been using NGK on our '02 Lancer pizza and it's a bang for a buck talaga. Most mitsu casas were using it back then when it was still under warranty. As long as you religiously follow the manufacturer's recommended interval for changing spark plugs (tune-up nadin!),then, IMO, your box-type gsr is as good to go w/ the latest models even with NGK spark plugs.
NGK or DENSO pa din. Mas mahal sila sa BOSCH at sila ang OEM ng mga japanese makes. I myself use NGK pero nung minsan binigyan ako ng uncle ko ng BOSCH kaya yun na lang sinalpak ko, libre e. hehehe.
Kung Lancer NGK hanapin mo . Bili ka doon sa mga reputable na suking auto supply mo . Marami rin fake na lumalabas lalo na pag mura presyo magduda ka na.
NGK or DENSO pa din. Mas mahal sila sa BOSCH at sila ang OEM ng mga japanese makes. I myself use NGK pero nung minsan binigyan ako ng uncle ko ng BOSCH kaya yun na lang sinalpak ko, libre e. hehehe.
Mag platinum plugs ka na lang siguro sir kasi mas mahaba buhay nila plus mas ok ang sunog. NGK = BPR5EGP or BOSCH = WR8DP.