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⚡ Spark your engine’s potential with Bosch Double Iridium – where power meets longevity!
Bosch 9603 OE Double Iridium Spark Plug features ultra-fine iridium electrodes and 360-degree laser welding for superior ignitability, reducing voltage requirements by up to 24%. With 4X longer life than copper plugs and corrosion-resistant nickel-plated threads, it offers hassle-free installation and OE-level performance for modern gasoline engines, including GDI. Compatible with a broad range of premium vehicles, this spark plug delivers reliable, high-performance ignition engineered in Germany.
| ASIN | B00515NH4K |
| Best Sellers Rank | #158,888 in Automotive ( See Top 100 in Automotive ) #1,089 in Automotive Performance Spark Plugs |
| Brand | BOSCH |
| Customer Reviews | 4.6 4.6 out of 5 stars (829) |
| Date First Available | 7 August 2012 |
| Exterior | Machined |
| Item Weight | 22.7 g |
| Item model number | 9603_1 |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9603 |
| Model | Spark Plug |
| OEM Part Number | 9603 |
| Position | Front, Rear |
| Product Dimensions | 10.16 x 17.78 x 22.86 cm; 22.68 g |
A**R
Toyota Sienna 2006
Q**Q
The plugs I received were made in Germany. The plugs are almost half the cost of Denso and they perform just as well. I would recommend these plugs.
B**D
Nice product
S**N
I got these for my 2002 GS430 and boy do they help get all the power out of my engine. I have an exhaust leak and trans leak that leads to a laggy bogged down performance, but by swapping out with these plugs yearly I can keep the power more responsive. I tried other plugs, but these seem to do the best for me in my case. Installation was straight forward and these tightened in place great with a little bit of antiseize.
S**K
Ok