The Bosch 9652 Double Iridium Spark Plug is designed for superior strength and longevity. With its ultra-fine wire design and laser-welded tapered ground electrode, this plug delivers exceptional performance and ignition capability.

Key Features

  • Double iridium firing pin and ground electrode
  • OE Fine Wire design
  • 4-year satisfaction guarantee

Features and Specs for Each Model

  • Double Iridium construction
  • Thread size: 14mm
  • Hex size: 5/8″ (16mm)

Pros

  • High ignitability
  • Improved throttle response
  • 4-year guarantee

Cons

  • Slightly expensive

Amazon Customer Review

★★★★ “The spark plugs are working great. The 4-year guarantee is a nice addition!” – Robert L.

Conclusion

The Bosch 9652 Double Iridium Spark Plug provides exceptional durability and performance. Though a bit on the expensive side, the 4-year satisfaction guarantee makes this a less risky investment.

Now retrieving an image set.

NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Irid...
4.5 out of 5 stars(4552687)
$34.99 (as of March 5, 2026 13:03 GMT -06:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)

Now retrieving an image set.

NGK 6578 Spark Plugs (BPR4ES) - Pack of 2, Copper
4.8 out of 5 stars(4852606)
$8.80 (as of March 5, 2026 13:03 GMT -06:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)

Now retrieving an image set.

8 Pcs Spark Plug Wires Set & 41-110 Iridium Spark ...
4.4 out of 5 stars(445158)

Now retrieving the price.

(as of March 5, 2026 13:03 GMT -06:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)

Now retrieving an image set.

NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridi...
4.7 out of 5 stars(4752048)
$32.00 (as of March 5, 2026 13:03 GMT -06:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)