umair

I have a 2000 ls1 5.7 car and I want to change the spark plugs. What part number do I need. AC Delco Preferred.

wildcamaro

iTrader: (15)

AC Delco Iridium 41-110

umair

Thaks exactly what I was looking for. Great site!

wildcamaro

iTrader: (15)

I know this place is the LS engine Mecca for info!

ejbta2

NGK TR6 is what I run

baalic

iTrader: (8)

NKG TR6 are not the standard on a stockish motor, NGK TR55 is the norm if going with a brand other then Delco

LilJayV10

iTrader: (39)

Quoted for truth.

birner88

41-110 all day bud

fspeedster

iTrader: (6)

Anyone have an idea why these are so hard to find?

muayyadf1

you can use tr5

baalic

iTrader: (8)

Every parts store in my town has them, order then from autozone and have them shipped to you?

wildcamaro

iTrader: (15)

Delcos for life...I don't like any jap **** in my v8 lol...meanwhile prob half performance parts on my car are prob from china

baalic

iTrader: (8)

Last I checked, delco bought NGK, and lots of stock ls1's came with Denso's stock... Mine did, so your flawed in your theory sir

wildcamaro

iTrader: (15)

I didn't know that bought denso's coming stock, was that just in later models I assume 01-02?

baalic

iTrader: (8)

Not sure the years, the only 4th gens I've ever owned were 2002's.... But yah I didn't believe it when I changed them so I looked it up....corvette forum guys were discussing the same thing lol

GMtechmatt

delco are 12621258 but i perfer TR5

mjs1012

iTrader: (36)

Tr55. Any auto parts store should have them.

maxpower_454

iTrader: (7)

What NGK's are the AC Delco equal to? I'm doing a H/C install with 11:1 comp but my advance auto only has NGK TR5 IV. I'd rather use ac delco's if possible. I'd also like to get them from Advance and use the online coupon codes!

maxpower_454

iTrader: (7)

Anyone?

LilJayV10

iTrader: (39)

http://www.acdelco.com.au/PDFs/Catal...rk%20Plugs.pdf

This is AC Delco's spark plug book.

Page 14 lists the stock plugs for LS1's. Page 55 has the heat range for platinum plugs.