Delivery info

Delivery is generally
within 2-10 days, depending
on your location.

30 days returns

Return will not accepted if the product is opened or after use. All returns requests need to be within 30 days of when the original order was received. Original shipping costs will not be refunded.




  • Double iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard Copper plugs
  • 0.6mm fine wire firing pin provides superior ignitability and performance
  • 360 degree continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability
  • 7 year performance Satisfaction guarantee
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function


Bosch 9604/FR7LII33X Double Iridium Spark Plugs are engineered to deliver both high performance and long life, representing advanced original equipment (OE) spark plug technology. The ultra-fine wire design and laser welded tapered ground electrode deliver optimum performance, while the Iridium center electrode and ground electrode help it to go the distance.

OE-matched spark position ensures compatibility with Gasoline Direct Injection (GDI) technology used in modern gas engines. Bosch Double Iridium Spark Plugs are pre-gapped at the factory and feature nickel plated rolled threads that require no anti-seize, for simple, easy installation right out of the box. Unlock the performance in your engine with Bosch Double Iridium Spark Plugs.



  • Buick (2011-2009, 2007-2006, 1993-1987)
  • Cadillac (1988-1986)
  • Chevrolet (2011-2001, 1994-1987)
  • GMC (2007-2001)
  • Oldsmobile (1993-1986)
  • Pontiac (2010-2006, 1994-1987)
  • Saturn (2010-2006)


Center Electrode Core MaterialNickel-Yttrium and Copper and Iridium
Center Electrode Tip MaterialIridium
Ground ConfigurationStandard
Ground Electrode Core MaterialN/A
Ground Electrode Quantity1
Ground Electrode Tip DesignTapered
Ground Electrode Tip MaterialNickel-Yttrium and Iridium
Hex Size16
Insulator MaterialCeramic
Insulator TypeProjected
Manufacturer Heat Range9
Outdoor Power Equipment ApplicationNo
Package ContentsSpark Plug
Package Quantity1
Pre-Gap Size1 mm
Prop 65 Warning Label Required?No
Reach17.5 mm
Resistance6000 Ohms
Seat TypeTapered
Short StyleNo
Spark Plug Type4-Cycle
Thread Diameter14 mm



Added to cart successfully!