PLUG??

[GTP4]

My brother in law has 02 gtp.
Mods#1.9's,zz p stg 1 tb,cai,tune,stock pulley,3"x-haust.
He say instead of using autolites he wants to use ac delco.
He works for a parts store and came up that autolites cross to ac delco part#R42LTS.
Anybody using this?
What should he use?

 

[Bio248]

copper spark plugs are best in a boosted application, despite their short life span.

 

[SyntheticShield]

^^ X2

 

[FuglyGTP]

when you say short, how short are you talking about?

 

[TDCRacing]

6000-9000 miles.

 

[Bio248]

i havent changed mine in a while. maybe that's why my car runs like crap. haha.

 

[blueguy]

Yeah I am lucky to get about 5,000 to 7,500 out of mine...I change the plugs every OTHER oil change