What spark plugs should i use?

Discussion in 'GM Powertrain' started by nos351wcm, Sep 14, 2009.

  1. nos351wcm

    nos351wcm Rockstar

    Hello again, anyone know what are good spark plugs?
    Autolite? AC Delco? i have 107+k miles on my truck and as far as i know i still have the factory plugs.
    Cheers from NJ
  2. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    what spark plugs should I use

    Ive tried all the latest spark plug fad over the years and Ive found with a stock to slightly mod. engine, the original brand and heat range works best. I think you said you had over 100,000 on your original plugs. I think that speaks for itself.

    99'HEARTBEAT MODERATOR Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    I stayed with A/C Delco Iridium Plugs,and I have been pleased with Performance I've received from them.Also you may want to throw on a Set of New Wires.
  4. zachh1020

    zachh1020 Rockstar 100 Posts

    Don't get the Bosch +4 quad tip plugs! No matter how many times I torque them down, a few keep coming loose in my 2003 Silverado and it is a known issue with those plugs. Definitely not worth $8.50/plug. I wish I would have know about it before I got them. Oh well. Live and learn.
  5. neverenough

    neverenough New Member

    X2 Go with the factory
  6. nos351wcm

    nos351wcm Rockstar

    Thanks guys, i went with autolite. At 1.50 a plug on a stock engine, i think theyll do just fine. gapped em and put them in today, truck runs great.
    Cheers from NJ
  7. Z-71

    Z-71 Rockstar 100 Posts

    My owners manual lists two stock plug numbers,one is for AC Delco and the other is for NGK.I use the stock NGK and it works great.

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