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  • In Stock
  • Ships out in 1-2 business days
  • Sold individually
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  • 5 5 out of 5 stars
    (5 customer reviews)

  • Part #: PYRE356
  • Mfr #: E3.56
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1987-1990 Cadillac Brougham Spark Plug - E3 - E3 DiamondFire, Direct fit

  • Product Details
  • Related Products
  • Fitment Info
E3 DIAMONDFIRE SPARK PLUG, SOLD INDIVIDUALLY -- 14 mm thread size, 19 mm reach, 0.62 in. hex size, gasket seat, resistor, 1.016 mm non-adjustable gap size, copper core electrode material, nickel alloy electrode tip material, projected insulator type; Guaranteed to provide more power while using less fuel, quicker starts and less fouling than competitive standard spark plugs.
  • Series: E3 DiamondFire
  • Product Fit: Direct fit
  • Quantity Sold: Sold individually
  • Electrode Core Material: Copper
  • Plug Type: Resistor
  • Product Class: Fuel saver
  • Anticipated Ship Out Time: 1-2 business days
  • Electrode Tip Material: Nickel alloy
  • Gap Size: 1.016 mm
  • Reach: 19 mm
  • Thread Size: 14 mm
  • Warranty: 5-year or 100,000-mile E3 limited warranty
This product fits the following Cadillac Brougham submodels
  • 1987-1990: Base; 8 Cyl 5.0L;
  • 1987-1990: d'Elegance; 8 Cyl 5.0L;

Product reviews

Very Nice by fhccaretaker, September 5, 2010

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I also noticed more acceleration and power pulling our RV


by laguna, February 23, 2010

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put into a 85 chev suburban with 170,000 miles power and performance came up milage up about 2mpg and oil usage way down


Excellent Spark Plugs by knb, July 30, 2009

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Great plugs. Car seems to perform better than before installation.


E3 spark plugs by Bern, May 20, 2009

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I have these in all my gasoline engines (2 Hondas) and 1 Miata) as well as my power equipment such as pressure washers, grass trimmers, mowers, tiller, edger, blower, and my snow blower. They work well and are outstanding. Had a friend install them in his vehicle too! Will always use these in my internal combustion engines.


E3 Spark Plugs for 2006 Mini Cooper S by Nutmegger, April 21, 2009

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Too early to tell. I have read mixed reviews about performance. The Mini gets 36 mpg on the highway and so if the plugs perform they will produce the same or better results.